Shimano 105 FC-RS510 Hollowtech II Crankset (Black)
EFCRS510CX26X
A 105-level crankset for riders stepping up from entry-level gearing who want stiffer, more efficient power transfer, with a 52-36T spread that stays quick on flats without giving up climbing range.
Overview
The FC-RS510 borrows the asymmetric 4-arm, 110mm BCD spider design first developed for Shimano's Dura-Ace, Ultegra, and 105 groupsets, then packages it into a more affordable 2-piece crankset. The 2-piece construction - where the right crank arm and axle are forged as a single unit - increases stiffness and spaces the bearings further apart, giving a stronger, more efficient pedaling platform than a typical 3-piece crank at this price point.
This build comes with a 52-36T aluminum chainring set on aluminum crank arms, paired with a 24mm steel axle built to the Hollowtech II interface, so it drops into any Hollowtech II-compatible bottom bracket (sold separately). It's designed around Shimano's 11-speed drivetrains and shifts cleanly with 105 and Ultegra-level mechanical or Di2 shifters, using HG-EV or HG-X11 chains.
It's the kind of upgrade that makes sense once you've outgrown a Sora- or Tiagra-level crankset - on longer weekend rides, club rides, or daily commutes where the extra stiffness and shifting precision are worth feeling, without stepping all the way up to a full Ultegra groupset price tag.
Why You'll Like It
Dura-Ace-Derived Stiffness, Entry-Level Price
The same asymmetric 4-arm, 110mm BCD spider design used on Shimano's Dura-Ace, Ultegra, and 105 cranksets carries over here, giving a genuinely stiffer power-transfer platform than most cranks in this price range.
2-Piece Forged Construction
The right crank arm and spindle are forged as one piece, spacing the bearings further apart for extra rigidity and a smoother, more efficient pedal stroke.
Semi-Compact 52-36T Gearing
The 52T big ring keeps you fast on flats and descents, while the 36T inner ring gives enough range for rolling terrain and moderate climbs - a practical spread for everyday road riding.
Wide Shifter Compatibility
Works cleanly with Shimano's 11-speed 105 and Ultegra mechanical and Di2 shifters, so it slots into most mid-range road builds without hunting for special-fit parts.
Bring Your Own Bottom Bracket, Your Choice
The 24mm steel axle fits any standard Hollowtech II bottom bracket, so you can match it to whatever's already in your frame or pick the exact BB you want rather than being locked into one that's bundled in.
Who Is It For?
This crankset makes the most sense for riders upgrading from a Sora- or Tiagra-level stock crank who want a noticeable jump in stiffness and shifting quality - the kind of difference you feel on longer weekend rides or when you're pushing hard on a group ride through the city's outer roads.
It's also a good fit for anyone building up a frame from scratch - a frame swap, a custom build, or a bike bought frame-only - who wants a dependable, road-ready crankset that's easy to source parts for and doesn't demand an Ultegra-level budget.
Good to Know
Pairs with any Hollowtech II-compatible bottom bracket (e.g. BB-RS500/BB-RS501 or equivalent) - since the BB isn't included, plan for it as part of your install so everything drops in together.
Shifts best with Shimano's HG-EV 11-speed or HG-X11 chains.
Have your mechanic torque the crank bolt and bottom bracket to Shimano's specified values during install - correctly seated bearings are what keep this crankset feeling stiff and smooth over the long run.
Technical Specifications
- Groupset Series: Shimano 105 / Ultegra-compatible (11-speed)
- BB Compatibility: Hollowtech II (24mm steel axle)
- BCD: 110mm, 4-arm asymmetric
- Chain Line: 43.5mm
- Q Factor: 150mm
- BB Shell Width: 68mm (threaded)
- Chainring Mount: 2x (double chainring, 52-36T)
- Drivetrain Speed Compatibility: 11-speed
- Chainring Material: Aluminum (resin insert on large ring)
- Crank Arm Material: Aluminum
- Chain Guard: Not included
- Weight: Approx. 908g (manufacturer-specified, 170mm crank arm)
What's in the Box
- 1 x Shimano FC-RS510 crankset (52-36T)
- 1 x crank bolt
- Bottom bracket not included - pick a Hollowtech II-compatible BB (e.g. BB-RS500/BB-RS501) separately
Additional Information
- Country of Origin: Malaysia/Japan
- Imported By: Shimano South Asia Pvt Ltd., 19, (Ground Floor) Kumara Krupa Road, Bangalore – 560 001, Karnataka, India.
- Net Quantity: 1N
- Customer Care Address: 291, 10 Main, 5 Block, Jayanagar, Bangalore - 560041. Ph: (080)47183232, Email: support@bumsonthesaddle.com
- Commodity: Cranksets
