Road cycling guides
Tire widths and pressures, hookless rules, cleats and power meters for road bikes. Every claim links to its source.
9 guides and tools
ToolRoadGravelTires & pressure
Tire pressure calculator
Front and rear pressure in psi and bar from your weight, tire width and riding surface. Road and gravel, tubeless or tubes.
ToolRoadGravel
Gear ratio calculator
Ratio, development in metres and speed at 90 rpm for every gear. Compare two setups, like 2x against 1x.
RoadPower metersPedals & cleats
SPD-SLR power meter pedals: none yet, and what to buy instead
No brand lists an SPD-SLR power meter pedal yet. The SPD-SL power pedals from Favero, Garmin, Magene and SRM, the Look and Speedplay alternatives, and what Shimano says about its cleats.
RoadGravelPower meters
Best-value power meters: brand-listed prices by type
Pedal, crank arm, spindle and spider power meters by brand-listed US price, sides measured, battery, and what the spare parts cost.
RoadTires & pressure
Are TPU inner tubes worth it?
TPU tubes against butyl, latex and tubeless: what BRR's drum test and a real-road roll-down show, plus repairs, rim brakes and hookless rims.
RoadGravelTires & pressure
How often should you top up tubeless sealant?
How often to check tubeless sealant on road and gravel, how much to use by tire width, and what shortens its life.
RoadGravelTires & pressure
Does rim width change tire width? Yes, and your pressure should follow
How much a wider rim widens your tire (the 0.4mm rule), what BRR measured, and how much it changes the pressure you should run.
RoadGravelPedals & cleats
Shimano 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.
RoadTires & pressure
Road 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.
RoadGravelTrainers
Smart 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.
RoadTires & pressure
Hookless-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.