The Hollow Tech II 11-speed Ultegra chainset offers an ideal balance of light weight & stiffness, making it the perfect choice for both enthusiast & competitive riders. Hollow Glide hollow outer chainring gives vast improvements in rigidity by virtually removing outer chainring flex & hugely improves shift performance, even under high load. The chainring teeth have been developed to work in conjunction with 11-speed HG-EV chains for increased contact to provide greater efficiency & enhanced power transfer. Industry leading Hollow Tech II cold forged 4 arm hollow cranks have been evolved for maximum rigidity while reducing weight. A wide range of chainring options & crank arm lengths are available to meet the needs of all riders & racing disciplines. Hollow Tech II integrated bottom bracket uses a wider bearing placement & larger axle diameter for increased stiffness & efficiency. Hollow Tech II integrated bottom bracket seal design has minimal bearing interface ensuring smooth rolling & increased durability. ...

Shimano UN54 Bottom Bracket for square taper chainsets Smooth running, reliable bottom bracket to fit standard square taper type cranks. Available in a selection of axle lengths & in 68mm or 73mm shell sizes. Check the spec for your bike or measure your existing bottom bracket to make sure you choose the right size. ...

A good quality bottom bracket for traditional chainsets Super-accurate bearings for smooth operation & enhanced durability Durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting Lightweight hollow spindle Maintenance-free sealed cartridge bearing assembly keeps out dirt, mud, & water for long bearing life Fast & easy installation without adjustment Narrow body allows clearance for cable routing under the bottom bracket ...

WH-9000 TU carbon tubular wheels, designed to meet pro road race criteria Lightweight tubular full carbon 3.5cm deep 20.8 mm wide rim for enhanced aerodynamics & increased rigidity for sprinters & TT specialists 21 rear & 16 front stainless steel butted & bladed straight pull spokes for optimal balance & rigidity (OPTBAL) Elbow-less spokes make for a strong yet compliant wheel High lateral rigidity is produced with a 3 mm offset asymmetric rear rim & wide flange spacing Freehub uses quick pawl engagement every 10 degrees Labyrinth double-contact sealing effectively shuts out water & dirt Alloy cone with integrated steel Borozon treated bearing races
- super mirror finish reduces friction Quick & easy to maintain digital click bearing adjustment Cold forged, machined aluminium hub shell & oversized 7075 alloy axle combined with a titanium Freehub body keep the wheel weight to a minimum 700C tubular compatible 8, 9, 10 & 11-speed compatible rear wheel Supplied with Q/R skewer Average weight 1362 grams a pair
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WH-R9100 CL carbon clincher wheel, designed to meet pro road race criteria Lightweight clincher carbon 3.5cm deep 22.4 mm wide rim with alloy braking surface for enhanced aerodynamics, increased rigidity & excellent inertia for sprinters & TT specialists Stainless steel butted (2.0-1.8-2.0) & bladed straight pull spokes for optimal balance & rigidity Elbow-less spokes make for a strong yet compliant wheel High lateral rigidity is produced with a wide flange spacing Labyrinth double-contact sealing effectively shuts out water & dirt Alloy cone with integrated steel Borozon treated bearing races
- super mirror finish reduces friction Quick & easy to maintain digital click bearing adjustment Freehub uses quick pawl engagement every 10 degrees Cold forged, machined aluminium hub shell & oversized 7075 alloy axle combined with a titanium Freehub body keep the wheel weight to a minimum 700C clincher compatible Supplied with Q/R skewer 8, 9, 10 & 11-speed compatible rear wheel
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WH-R9100 TU carbon tubular wheel, designed to meet pro road race criteria Lightweight tubular full carbon 60 mm deep 28 mm wide rim for enhanced aerodynamics, increased rigidity & excellent inertia for sprinters & TT specialists 21 stainless steel butted (2.0-1.8-2.0) & bladed straight pull spokes for optimal balance & rigidity (OPTBAL) Elbow-less spokes make for a strong yet compliant wheel High lateral rigidity is produced with a wide flange spacing Labyrinth double-contact sealing effectively shuts out water & dirt Alloy cone with integrated steel Borozon treated bearing races
- super mirror finish reduces friction Quick & easy to maintain digital click bearing adjustment Freehub uses quick pawl engagement every 10 degrees Cold forged, machined aluminium hub shell & oversized 7075 alloy axle combined with a titanium Freehub body keep the wheel weight to a minimum 700C tubular compatible Supplied with Q/R skewer 8, 9, 10 & 11-speed compatible rear wheel Average weight 652 grams
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WH-R9170 TL carbon clincher disc brake wheels, designed to meet pro road race criteria Lightweight clincher full carbon 40 mm deep 24 mm wide rim for enhanced aerodynamics, increased rigidity & excellent inertia Easy to use Centre-Lock rotor mount for use with disc brakes 24 stainless steel butted (2.0-1.8-2.0) & bladed straight pull spokes for optimal balance & rigidity Elbow-less spokes make for a strong yet compliant wheel High lateral rigidity is produced with a wide flange spacing Labyrinth double-contact sealing effectively shuts out water & dirt Alloy cone with integrated steel Borozon treated bearing races
- super mirror finish reduces friction Quick & easy to maintain bearing adjustment Freehub uses quick pawl engagement every 10 degrees Cold forged, machined aluminium hub shell & oversized 7075 alloy axle combined with a titanium Freehub body keep the wheel weight to a minimum 700C clincher (tubeless compatible), 23
- 32C100 x 12 mm front, 142 x 12 mm rear axle 8, 9, 10 & 11-speed compatible rear wheel Average weight 1563 grams

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WH-R9170 TU carbon tubular disc brake wheel, designed to meet pro road race criteria Lightweight tubular full carbon 40 mm deep 24 mm wide rim for enhanced aerodynamics, increased rigidity & excellent inertia Easy to use Centre-Lock rotor mount for use with disc brakes 24 stainless steel butted (2.0-1.8-2.0) & bladed straight pull spokes for optimal balance & rigidity Elbow-less spokes make for a strong yet compliant wheel High lateral rigidity is produced with a wide flange spacing Labyrinth double-contact sealing effectively shuts out water & dirt Alloy cone with integrated steel Borozon treated bearing races
- super mirror finish reduces friction Quick & easy to maintain bearing adjustment Freehub uses quick pawl engagement every 10 degrees Cold forged, machined aluminium hub shell & oversized 7075 alloy axle combined with a titanium Freehub body keep the wheel weight to a minimum 700C tubular compatible, 23
- 28 For 142 x 12 mm axle 8, 9, 10 & 11-speed compatible rear wheel Average weight 774 grams

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WH-R9170 TU carbon tubular disc brake wheel, designed to meet pro road race criteria Lightweight tubular full carbon 60 mm deep 24 mm wide rim for enhanced aerodynamics, increased rigidity & excellent inertia Easy to use Centre-Lock rotor mount for use with disc brakes 24 stainless steel butted (2.0-1.8-2.0) & bladed straight pull spokes for optimal balance & rigidity Elbow-less spokes make for a strong yet compliant wheel High lateral rigidity is produced with a wide flange spacing Labyrinth double-contact sealing effectively shuts out water & dirt Alloy cone with integrated steel Borozon treated bearing races
- super mirror finish reduces friction Quick & easy to maintain bearing adjustment Freehub uses quick pawl engagement every 10 degrees Cold forged, machined aluminium hub shell & oversized 7075 alloy axle combined with a titanium Freehub body keep the wheel weight to a minimum 700C tubular compatible, 23
- 28 For 142 x 12 mm axle 8, 9, 10 & 11-speed compatible rear wheel Average weight 829 grams

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Shimano XT Mountain Bike Chainset (M770) A high performance chainset from the classic ATB group, using the most advanced 10-speed Dyna-Sys chainrings Forged Hollow Tech II aluminium cranks offer unrivalled strength-to-weight ratio Lightweight construction with external super smooth bottom bracket bearings for efficient use Drilled steel & carbon composite construction middle ring combined with a thicker aluminium double anodized 42 tooth, & plated aluminium 24 tooth ring for excellent rigidity & durability Close ratio gear combination: 42-32-24T provides enhanced cadence while reducing pedal feedback on suspension bikes HG-X chainring with patented spike pins give smooth & fast gear shifts under load Stiffness & strength increased with advanced design due to wider spaced bearings & oversized axle 104 / 64 PCD four-arm chainrings For use with 10-speed HG-X MTB chains only We recommend that this bottom bracket is initially installed by a bike shop to ensure perfect bottom bracket facing & fit Comes complete with bottom bracket for 68 & 73 mm frames Average weight 862 g (175 mm including BB) ...