Hubs

WHY WE MAKE THIS Originally, we made this hub to be the cornerstone of our hub product line. It was one of those product releases where we put all our hub and bearing experience into, and ended up with a hub that struck that perfect balance between weight, performance, durability and looks. Since the advent of disc brakes (and the R45D), we keep making it, because it’s still that cornerstone hub, and so many of our riders still love to rock their rim brakes on road and off. WHY YOU WANT IT The R45 front hub is lighter and more aerodynamic than most built-to-last hubs on the market. We use a narrow hub body and low flanges to make the R45 a rock solid starting point for any fast wheel build. Our bearings, both steel and ceramic, have heat-treated, surgical grade steel races that are machined simultaneously to ensure perfect matching. The quality and speed of our bearings is what you will feel (and hear) on every ride. As Chris King bearing tracks burnish they get actually get faster. A little bit of regular love (i.e. service) will keep this hub rolling for years upon years of demanding use. -Steel Bearings - Engineered, manufactured, and assembled in Portland, Oregon USA - King Lifetime Warranty - Legendary made-in-house bearings - Easily serviceable with a 2.5mm hex and pick or pen knife - Completely re-buildable with our R45 Hub Service Tool - Available in 28h and 32h - Ceramic bearing upgrade available HUB SPECIFICATIONS - Axle Width: 100mm - Flange Diameter DS & NDS: 39.8mm - Center to Flange DS: 34.8mm - Center to Flange NDS: 34.8mm

- Elite Series convertible road disc hubs - Available in multiple axle configurations - Shimano and Campagnolo cassette body options with 6 pawl/48 point/7.5° engagement - Straight pull and J-bend spoke options - 6 bolt and Center Lock disc brake rotor options - Sealed bearings - Material: AL6061 Straight Pull Spoke/QR Axle: PCD-L: 35mm PCD-R: 49mm LTF-L: 32.75mm LTF-R: 50.05mm CTF-L: 34.9mm CTF-R: 17.6mm Straight Pull Spoke/12mm Thru-Axle: PCD-L: 35mm PCD-R: 49mm LTF-L: 36.25mm LTF-R: 53.55mm CTF-L: 34.9mm CTF-R: 17.6mm J-Bend Spoke/QR Axle: PCD-L: 45mm PCD-R: 50.6mm LTF-L: 32.65mm LTF-R: 48.2mm CTF-L: 35mm CTF-R: 19.45mm J-Bend Spoke/12mm Thru-Axle: PCD-L: 45mm PCD-R: 50.6mm LTF-L: 36.15mm LTF-R: 51.7mm CTF-L: 35mm CTF-R: 19.45mm

- Elite Series convertible MTB hubs - Available in multiple axle configurations - Shimano and XD cassette body options with 6 pawl/54 point/6.6-degree engagement - Straight pull and J-bend spoke options - 6 bolt disc brake rotor compatible - Sealed bearings - Material: AL6061 J-Bend/QR: - PCD-L: 58mm - PCD-R: 58mm - LTF-L: 32.95mm - LTF-R: 48.45mm - CTF-L: 34.7mm - CTF-R: 19.2mm J-Bend/142 x 12mm: - PCD-L: 58mm - PCD-R: 58mm - LTF-L: 36.45mm - LTF-R: 51.95mm - CTF-L: 34.7mm - CTF-R: 19.2mm Straight Pull/QR: - PCD-L: 51mm - PCD-R: 51mm - LTF-L: 36.2mm - LTF-R: 50.1mm - CTF-L: 31.45mm - CTF-R: 17.55mm Straight Pull/142 x 12mm: - PCD-L: 51mm - PCD-R: 51mm - LTF-L: 39.7mm - LTF-R: 53.6mm - CTF-L: 31.45mm - CTF-R: 17.55mm

- Forged alloy construction - Sealed Cartridge bearings - Double contact seals - 6-bolt disc - 12x142mm rear spacing - Aluminum hub body

• Aluminum hubs • Sealed bearings • 1-speed freewheel threading • 32-hole spoke drilling • Bolt-on 3/8-inch axle • 135mm hub spacing • Black or silver

- Press fit designed to work the hub's non-drive side collar.

- Elite Series convertible MTB hubs - Available in multiple axle configurations - Shimano and XD cassette body options with 6 pawl/54 point/6.6° engagement - Straight pull and J-bend spoke options - 6-bolt disc brake rotor compatible - Sealed bearings J-Bend SPECIFICATIONS - OLD: 110mm - Left Flange Diameter: 58mm - Right Flange Diameter: 45mm - Left Locknut-To-Flange: 27.05mm - Right Locknut-To-Flange: 15.05mm - Left Center-To-Flange: 27.95mm - Right Center-To-Flange: 39.95mm Straight-Pull SPECIFICATIONS - OLD: 110mm - Left Flange Diameter: 55mm - Right Flange Diameter: 55mm - Left Locknut-To-Flange: 31.5mm - Right Locknut-To-Flange: 19.5mm - Left Center-To-Flange: 23.5mm - Right Center-To-Flange: 35.5mm

- An oversized hub shell increases torsional and lateral stiffness - 6902 bearings for maximum durability - Wide bearing placement was designed to decrease load on the bearings - Low-drag labyrinth seals - Tool-free endcaps - Torque-cap compatible - Includes standard 15mm end-caps only, Torque must be purchased separately

SRAM's 506 hub borrows technology from its more expensive brethren to bring you a solid hub at a great price. An aluminum hubshell with hi/lo flanges provide no-nonsense durability and even spoke tension. Dependable cup and cone bearings with polished races roll smooth for the long haul and a strong, steel quick-release axle holds up under pressure.

- High-quality road hub with 1-piece forged and CNC machined alloy body - Sealed bearings for increased performance and contamination resistance - 7075AL machined axle Specifications: - Use: FT - Spacing / Axle: QR - Material: Alloy - Weight: 79g - Brake Type: RIM - Bearing Type: Sealed

Featuring WTP's very own, patented 3-point clutch friction system, the Helix hub will take you backwards in style and hold up to any peg abuse that comes its way. - Unique internal arrangement with face-bearing clutch stopper - WTP Patented "Tri-Point" friction system - Hub Drilling: 32 - Cassette Body Type: Single Cog Driver - Axle Size: 14mm - Spoke Interface: J-Bend

There is a wild spirit here in the southern Appalachian mountains, from the dense rhodo and laurel forest to the rushing rivers, and fog-covered valleys. This is the same spirit that inspired the bootleggers and moonshine runners to soup up old cars and illegally run shine from the law through the dirt roads that litter this landscape. They knew these roads like the back of their hands and knew exactly how much speed they could hold in every turn, in every condition. This spirit lives in mountain bikers who call this place home. Factor 601 was designed to meet the demands of these riders. From the oversized alloy shell, EZO bearings, easy maintenance, and low friction coasting, these hubs are the perfect companion to a rip through trails you may or may not have permission to be on! Boost 28H Alloy Shell EZO Bearings Laser-cut Logo, CNC’d Flanges 6-Bolt Disc P.C.D 58 C.T.L 29 C.T.R 41 F.T.F 69.5

The Shimano HB-M525A hub is ideal for use with 6-bolt disc brake rotors and quick release dropouts. - Double contact sealing - Super polished bearing races for low friction rolling - 6-bolt ISO disc mounting surface

The new standard for durability and price. - Patented Star-Ratchet system - Contact-free seals and high precision build guarantee smooth bearings - Press-fit end caps allow tool-free maintenance and conversion

- Elite Series convertible fat bike hubs - Available in multiple axle configurations - J-bend spoke compatible - 6 bolt disc brake rotor compatible - Sealed bearings - Bearing: Sealed - Material: AL6061 - Color: Blk - Brake Type: 6B - PCD-L: 58mm - PCD-R: 58mm - LTF-L: 27.65mm Quick Release: - Weight: 246g - LTF-R: 24.85mm - CTF-L: 39.85mm - CTF-R: 42.65mm 15mm Thru-Axle: - Weight: 256g - LTF-R: 27.65mm - CTF-L: 47.35mm - CTF-R: 47.35mm

- Elite Series convertible fat bike hubs - Available in multiple axle configurations - Shimano and XD cassette body options with 6 pawl/54 point/6.6° engagement - J-bend spoke compatible - 6 bolt disc brake rotor compatible - Sealed bearings - Material: AL6061 - Color: Blk - Brake Type: 6B - PCD-L: 58mm - PCD-R: 58mm Quick-Release: - LTF-L: 48.65mm - LTF-R: 48.65mm - CTF-L: 36.5mm - CTF-R: 36.5mm 12mm Thru-Axle: - LTF-L: 52.15mm - LTF-R: 52.15mm - CTF-L: 46.5mm - CTF-R: 46.5mm

- Elite Series road hubs - Straight pull and J-bend spoke options - Sealed bearings Straight Pull Spoke: PCD-L: 30.3mm PCD-R: 30.3mm LTF-L: 13.1mm LTF-R: 13.1mm CTF-L: 36.9mm CTF-R: 36.9mm J-Bend Spoke: PCD-L: 31mm PCD-R: 31mm LTF-L: 10.78mm LTF-R: 10.78mm CTF-L: 39.22mm CTF-R: 39.22mm

- Elite Series road hubs - Shimano and Campagnolo cassette body options with 6 pawl/48 point/7.5° engagement - Straight pull and J-bend spoke options - Sealed bearings - Material: AL6061 - Brake Type: Rim - OLD: 130mm Straight Pull Spoke: PCD-L: 32mm PCD-R: 52.5mm LTF-L: 27.7mm LTF-R: 50.8mm CTF-L: 37.45mm CTF-R: 14.35mm J-Bend Spoke: PCD-L: 38.5mm PCD-R: 50.6mm LTF-L: 27.45mm LTF-R: 49.05mm CTF-L: 37.7mm CTF-R: 16.1mm

The pinnacle among the hubs–Ratchet EXP united with SINC ceramic bearings. The premium 180 hub convinces with its sophisticated Ratchet EXP technology, giving the hub extra lightness, stiffness, and precision along with easy, no-tool maintenance. Furthermore, assembled with the low-friction SINC ceramic bearings, the hub performs efficiently and brings your power directly to the road. The hub is available for straight pull spokes only.

DT Swiss Sinc Ceramic cartridge bearings. - The black dust cover is intended to be installed facing the hub and the tan seal is intended to face externally

DT Swiss Sinc Ceramic cartridge bearings. - The black dust cover is intended to be installed facing the hub and the tan seal is intended to face externally

Direct power meets simplicity—running smoothly day-in and day-out. The 350 hub was developed according to the credo: Reliability meets simplicity. The simultaneous engagement of the ratchets and the resulting large engagement area provide reliability. The plugged construction allows easy maintenance without the need for tools. Adaptation to different axle standards or modification of the engagement angle is also possible with just a few manual steps.

Direct power transmission in every riding situation—240 with Ratchet EXP. With the latest generation of the 240 hub, the strengths have been further enhanced. The latest Ratchet EXP freehub system increases the bearing lifetime thanks to the increased bearing distance. The new version of the end caps simplifies tool-free disassembly and makes maintenance easier. The hollow-machined ratchets transfer your energy directly into acceleration thanks to the 36 teeth.

Surly's Ultra New Disc Rear Hub is just the thing for singlespeed fanatics and one-gear mountain riders. This gorgeous hunk of aluminum boasts reliable sealed bearings and a 6-bolt disc attachment on one side and threads for a singlespeed freewheel (or fixed cog) on the other. A hollow axle lets you choose how to secure it to your dropouts. You have choice between the included fixing bolts or a quick release skewer (sold separately). And, that aforementioned chromoly axle is flex-free to take all the abuse you can dish out, and then some!

Surly's Ultra New Rear Hub is ready for singlespeed mayhem. This gorgeous hunk of aluminum has the capability you need with reliable sealed bearings. It's available with threads for fixed cogs or freewheels, so you can set up the drivetrain of your dreams. Plus, this hub's 135mm width fits most MTB frames and the hollow chromoly axle provides a flex-free ride as well as simple quick-release skewer compatibility.

- Singlespeed freecoaster hubs with 9-tooth driver - Sealed bearings - Use: Rear - Gears: Singlespeed w/ 9-tooth driver - Drilling: 36 - Axle: 14mm - OLD: 110mm - Bearing Type: Sealed

- Heat-treated axle for improved strength - Angled Flanges for lateral stability in wheel building - Rear hubs include a 4-pawl cassette body with 9-tooth driver - Use: Front - Drilling: 36H - Material: Alloy - Brake Type: Rim - OLD: 100mm

- Nutted aluminum BMX hubs with cutout flanges for aesthetics and weight savings - Sealed bearing for improved performance and longevity - Use: Front - Drilling: 36H - Axle: 3/8-inch - Material: Alloy - Brake Type: Rim - OLD: 100mm

- Includes 9T Micro drive cog - Use: Rear - Driver: Singlespeed cassette w/9T cog and lockring - Drilling: 36H - Axle: Nutted 3/8-inch - Material: Alloy - Brake Type: Rim - OLD: 110mm - Bearing Type: Loose

R45D hubs combine a lightweight hub body, our legendary made-in-house bearings, and a six-bolt rotor mount to harness the power of disc brakes. The result is the increased power and modulation of disc brakes, the fast, smooth rolling speed of our bearings, and the rail steering from our one-piece solid axles. Our bearings, available in steel and ceramic, have heat-treated, surgical-grade steel races that are machined simultaneously, with tools of equal wear to ensure perfectly matched inner and outer races. The quality and speed of our bearings is what sets us apart from the competition and they are what you will feel and notice on every single ride. As Chris King bearing tracks burnish they get faster with age and all our hubs and bearings are fully serviceable for years upon years of demanding use. - Engineered, manufactured, and assembled in Portland, Oregon USA - 5-year built-to-last warranty - Legendary made-in-house bearings - Easily serviceable and completely re-buildable with our R45 Hub Service Tool - Available in 9 beautifully anodized colors - Ceramic bearing upgrade available

- Aluminum hubs - Loose ball - Bolt-on - Axle: B/O 3/8 - Material: Aly - Color: Blk - Brake Type: 6B - OLD: 135mm

Hope Front Axle Conversion Kits · Compatible with Pro 2 and Pro 2 Evo hubs · Converts all Hope Pro 2 and Pro 2 Evo front hubs to 20mm through axle hubs

• Aluminum hub body • Quick release • 100mm OLD • 20, 24, 28, 32, and 36-hole spoke drilling • Black or Silver

Shimano XT FH-M8010/M8000 Rear Hubs. - Double contact bearing seals - Super polished bearing races for low friction rolling - Shimano Quick-engagement freehub - Not compatible with Shimano 11-Speed Road cassettes - Cone bearings races ground by a Cubic Boron Nitride tool for smooth-rolling durability - Center Lock disc brakes provide reliable braking power (lockring sold separately)

Track stars and fixed-gear converts love Surly's Ultra New Track Rear Hub! This gorgeous hunk of aluminum boasts reliable sealed bearings, and your choice of fixed/fixed or fixed/free gearing. Plus, this hub's 120mm width fits most track frames and the flex-free solid axle is forged from rugged chromoly.

R45D hubs combine low-drag 45-tooth RingDrive™ system, a lightweight hub body, and legendary made-in-house bearings. The result is the increased power and modulation of disc brakes, the fast, smooth rolling speed of our bearings, and the superior responsiveness of our RingDrive engagement system when you put the power down. - Patented RingDrive system with 45 simultaneously engaged points of contact for virtually drag free engagement - Easily serviceable and completely re-buildable with our R45 Hub Service Tool - Hub Drilling: 32 - Skewer Included: No - Hub/Brake Compatibility: Center-Lock Disc - Cassette Body Type: Shimano/SRAM 11 Speed Road , Shimano/SRAM 8, 9, 10 Speed - Spoke Interface: J-Bend - Bearing Type: Sealed Cartridge

Hope Front Axle Conversion Kits · Compatible with Pro 2 and Pro 2 Evo hubs

- eMTB rated with steel axles - 6902 cartridge bearings and robust 10 degree engagement - 32h spoke count - For J-Bend spokes only

Shimano Alfine SG-S7001 Disc Brake Internally Geared Hub delivers an impressive gear range, spread across 8 speeds, all with the reliability and low maintenance you can only get with an internally geared hub. - Center Lock Disc Rotor Compatible - Rotor lockring not included - Hub Center to Flange: 30.0mm - Hub Drilling: 32-hole - Flange Diameter: 92.5mm - Drivetrain Speeds: 8 - Spoke Interface: J-Bend

- Dynamo generator front hub features 3.0-watt headlight power supply - A356 aluminum hub shell with 9mm solid nutted axle (140mm overall axle length) - Choose 70mm or 90mm drum brake (brake levers sold separately) - Light sold separately

- Kick-shift 2-speed hub - Coaster brake - Benefits include its simple backpedal-action shifting/braking and no cables or shifters - 6061 aluminum hub shell with 13/32" slotted solid axle (162mm overall axle length) - Gear ratio range of 138% - Includes 22 tooth 3-spline cog - 116mm OLD (over-locknut dimension)

Brake Interface : Disc(6-bolts) Spoke System: J-Bend Hole Count: 32 Weight: 141g ± 5g Material: Aluminum Gauge: 14 Bearings:2 (6903*2) P.C.D: ø 58 - ø 45 Axle System: 110 x 15mm

Brake Interface : Disc(6-bolts) Spoke System: J-Bend Hole Count: 32 Weight : 280g ± 5g (12Mx148mm) Material: Aluminum Gauge: 14 P.C.D:ø 58 - ø 58

Industry Nine Freehub bodies are machined in North Carolina and contain all necessary pawls, springs and bearings for servicing or converting their hubs. Convert or replace your existing Hydra mountain freehub body with this complete XD1 11/12 spd kit. Includes everything you need to swap the freehub and get riding Kits include freehub, bearings, inner spacer, pawls, and springs - Replacement and conversion freehub bodies - Complete freehub body kits with necessary parts to replace or convert your hub. - Freehub bodies fit all 2019+ Industry Nine Hydra rear hubs - Includes: (1) Hydra freehub XD or HG body shell, (1) bearing spacer, (1) 152610 bearing, (1) 15267A5 bearing, (6) Hydra pawls, (6) Hydra springs and (1) freehub body seal - HG+ Includes: (1) Hydra HG+ Micro Spline freehub body shell, (1) bearing spacer, (1) 152610A3 bearing, (1) 6802A3 bearing, (6) Hydra pawls, (6) Hydra springs, (1) freehub body seal and (1) MS 12mm drive side endcap. Compatible with 12x142/148/157/177/197 Hydra hubs Replace your existing Hydra mountain freehub with this complete XD 11/12 speed kit. If converting from Shimano Micro Spline, please note factory spec involves HAX2631 (QR) or HAX2637 (12x). Compatible With Hydra mountain rear hubshells Includes 1 - Hydra XD freehub body shell 1 - bearing spacer 1 - 152610 bearing 1 - 15267A5 bearing 6 - Hydra springs 6 - Hydra pawls 1 - freehub body seal

The Clutch Hub is a traditional clutch-based coaster hub design that eliminates all of the problematic elements on ordinary hubs and only keeps the parts that work. A new, super-strong FULL 14mm axle, bearing configuration, and drag mechanism design stops the need for constant repairs. Equipped with external slack adjustment, which can be done with a 2.5mm hex key through a hub shell access hole (can be adjusted without removing the wheel), and an improved plastic hub guard spec. Same Clutch coaster hub you’ve come to love, but with a few upgrades. Features: - Maximum strength axle design - Super-durable bearing arrangement throughout - 2.5mm hex key slack adjustment through hub shell access hole. No wheel removal required. - Super-durable drag mechanism design - Crankflip ready Improvements Over the Clutch V1: - 14mm chromoly axle bolts on both the drive and non-drive side for greater reliability - Improved clutch engagement - Improved manufacturing precision throughout - More slack than the V1 hub - All-new durable proprietary plastic spec for the removable hub guard Specs: - 36-hole, 2014-T6 aluminum shell - 9T Driver - Left or right hand drive - 22 oz / 623g Guard Options: - Plastic hub guard included (but optional to use) - Alloy hub guard also available

• Aluminum hubs • Sealed bearings • Quick release • 8-speed cassette • 36-hole • 135mm rear spacing • Black or silver

Whether the goal is a finish line, epic adventure or simply getting back home again, our new 900 hubs are ready for the challenge. On the inside, our smooth and durable DOUBLE TIME drive mechanism ensures rapid lightning-fast engagement for quick and confident pedal responsiveness. SPEEDBALL bearings provide smooth, long-lasting rotation performance. Multiple spoke-count and cassette-capability options, as well as interchangeable end caps make the 900 hubs a perfect choice for any disc-equipped road, gravel, cyclocross, cross country, trail, or enduro bike. - Includes Quick Release & 12x142mm Through AxleCaps - Fully convertible with tool free end caps - DOUBLE TIME mechanism offers smooth,quick and durable engagement - Versatile driver body can accept ROAD or MTB drivetrain, full spline or XD cassettes - Axle type: Conversion Caps included - Spoke holes: 24 - Brake compatibility: Disc (6-bolt) - Driver Mechanism: Double Time - Four Pawl - Axle material: Tapered aluminum - Driver body material: Aluminum - Hub shell: Aluminum - Seeker angled flanges - Oversized body

Light weight hub body and disc brake rotor mount. King in-house made bearings use surgical steel races machined at the same time to ensure a perfectly matched inner and outer race. - Easily serviceable and completely re-buildable - 5-Year warranty - Hub Drilling: 32 - Hub/Brake Compatibility: Center-Lock Disc - Color: Black - Spoke Interface: J-Bend - Front Axle: 12mm Thru x 100mm

Parts for repair and maintenance of DT Swiss hubs.

The value-packed DT Swiss 350s Straightpull road hub hits the sweet spot between light weight and reliability. The straight pull spoke design makes for a stiff, responsive wheel that will roll for thousands of nearly frictionless miles.

Direct power meets simplicity—running smoothly day-in and day-out. The 350 hub was developed according to the credo: Reliability meets simplicity. The simultaneous engagement of the ratchets and the resulting large engagement area provide reliability. The plugged construction allows easy maintenance without the need for tools. Adaptation to different axle standards or modification of the engagement angle is also possible with just a few manual steps.

- Tough on trail and light on price rated for everything from XC to Enduro and E-bike - Steel axles cartridge bearings robust alloy hub shell and steel cassette body - 10-degree pawl engagement - International Standard 6-bolt disc mount - *Shimano/SRAM

- Aluminum hubs - Sealed bearing - Nutted - Use: Front - Axle: 3/8-inch - Material: Alloy - Brake Type: Rim - OLD: 100mm - Bearing Type: Sealed

- Single speed BMX hubs with a 14mm axle slotted to 3/8-inch - Sealed bearings - Use: Rear - Gears: Singlespeed Freewheel - Drilling: 36H - Brake Type: Rim - OLD: 110mm - Bearing Type: Sealed

- Heat-treated axle for improved strength - Angled Flanges for lateral stability in wheel building - Rear hubs include a 4-Pawl Cassette body with 9-tooth driver - Use: Rear - Driver: Singlespeed cassette w/9T cog and lockring - Spacing / Axle: 14mm - Material: Alloy - Drilling: 48

12x142mm conversion endcaps for Hope Pro 2 Evo rear hubs.

Industry Nine Hydra Classic hubs are the heart of your wheelset, everything revolves around them, literally. Every Classic Hydra hub is made start to finish in Asheville, NC. From turning and milling bar stock 7075-T6 aluminum for shells, axles and encaps, wire EDM cutting A2 tool steel for pawls and driverings, to in-house anodization lab, every step of design, engineering, manufacturing and assembly is done to exacting standards. - 690 P.O.E. Hydra Freehub body engages every .52 degrees yeilding telepathic control - 6 pawl, 6 phase - 115 tooth drivering - Easily serviced with no proprietary tools. Designed to keep you in the saddle and out of the service queue - Classic j-bend spoke interface - Steel cartridge bearings are durable

The Box One Stealth Expert Rear Hub is designed to be lightweight for smaller riders and features small hub flanges, lower spoke counts, and decreased material to keep the weight down. Featuring our Stealth Technology adds instant engagement and silent low-drag coasting making it ideal for Mini, Junior, or Expert wheel build. Still, it may also accommodate a lightweight rider looking to move up to a pro-sized bike. FEATURES - Stealth Technology™ - Instant Power Delivery - Low Drag Coasting - Infinite Points of Engagement - Silent Coasting - Micro-Adjust Pre-Load Collar

The Shimano HB-RS470 front disc brake hub features a Center Lock design, Internal Grease Sleeve, and Cup and Cone Bearing technology. - The Center Lock system makes for easy rotor installation with a quick and secure spline mount and lock ring - Hub features internal o-rings and a grease sleeve that helps maintain grease levels and increases service life

The number to count on—240 with Ratchet EXP. The new 240 is developed for riders with the most extreme ambitions. The latest version of the hub is equipped with the Ratchet EXP system to maximize reliability. The increased bearing distance increases bearing lifetime, the straight spring provides more direct engagement (which reduces wear), and a smaller number of parts not only makes maintenance easier, but also reduces weight.