Guides

All guides and tools

• guideHookless-compatible road tires: every approved tire in one list

  Which road tires the brands approve for hookless (TSS) rims, in which widths and at what maximum pressure. Continental, Pirelli, Vittoria, Hutchinson, Schwalbe, Giant and Zipp in one place.

• guideSmart trainer compatibility for 12 and 13-speed drivetrains

  Which freehub body your direct-drive trainer needs for SRAM XDR, 13-speed XPLR, Campagnolo 13 and Shimano 12-speed. Wahoo, Tacx, Elite and Zwift, from their own support pages.

• guideGravel bike tire clearance chart: what the brands actually state

  Maximum tire width for popular gravel frames, only as the brands state it, with a note on whether each figure is a measured width or a stated max.

• guideUDH and SRAM Full Mount gravel frames: what fits, and what to check on a used bike

  What UDH and SRAM Full Mount mean, which gravel frames the brands list as UDH, what else 13-speed XPLR needs, and a used-bike checklist.

• guideRoad tire pressure for 28, 30 and 32mm tires

  Starting pressures for 28, 30 and 32mm road tires by rider weight, how rough roads and rim width change them, and where hookless limits get in the way.

• guideGravel tire pressure for 40mm tires, and what changes at 38 or 45mm

  Starting pressures for 38 to 45mm gravel tires by rider weight, the front/rear split, rim width effects and how far to go lower off-road.

• guideShimano SPD vs SPD-SL vs SPD-SLR: which cleats fit which pedals

  SPD, SPD-SL and the new SPD-SLR: bolt patterns, which Shimano cleats fit which pedals, where the 2.3 mm stack claim comes from, and who should switch.

• toolTire pressure calculator

  Front and rear pressure in psi and bar from your weight, tire and rim width, surface and setup. Based on Frank Berto's 15% tire-drop method, with hookless limits enforced.