Gravel bike guides
Tires, pressures, frame clearance and drivetrain standards for gravel bikes, sourced from the brands and published tests.
10 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.
GravelTires & pressure
Best gravel tires by use: what the 2026 lab tests say
Gravel tires for fast hardpack, mixed routes and mud, from GRAN FONDO's 2026 lab test of 32 tires: its rolling resistance and puncture scores, US prices, and the Rambler casing question.
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.
GravelPower metersPedals & cleats
SPD power meter pedals for gravel: Favero, Garmin, Look and SRM compared
Favero, Garmin, Look and SRM SPD power meter pedals compared on battery, charging, cleats, stack, road-body swaps and US list prices.
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.
GravelTires & pressure
Gravel 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.
GravelFrames & standards
UDH 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.
GravelTires & pressureFrames & standards
Gravel 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.
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.