De-mystify what fits your bike. Find compatible parts on eBay.
Bike saved to shed — pick a mode below to start searching.
See what the best available upgrade is across every part category for your discipline. Claude picks the ideal spec, then finds the best current eBay listing for each.
Takes a minute to build — results are cached so re-visits are instant.
Cassette
SRAM XX SL Eagle T-Type XS-1299 Eagle 10-52T 12-speed
Pro
~£499 new
The XX SL T-Type offers an unmatched 520% range with titanium/carbon construction, making it the lightest and most capable cassette for long gravel days with loaded bags or steep pitches.
Fits SRAM XDR freehub body (standard on high-end gravel wheelsets); 12-speed Eagle T-Type compatible with UDH or standard B-knuckle derailleur hangers
Runner-up: Shimano GRX RX-820 11-34T 12-speed
eBay?
Chain
SRAM XX SL Eagle T-Type Flattop Chain 12-speed
Pro
~£89 new
The XX SL Flattop chain is purpose-built for T-Type drivetrains, delivering ultra-smooth shifting and superior durability with its hollow-pin construction.
Direct T-Type Flattop compatibility with SRAM 12-speed Eagle drivetrains; requires PowerLock master link included
Runner-up: Shimano Dura-Ace CN-M9100 12-speed
eBay?
Tyres
Schwalbe G-One RS 700c x 40mm TLE (MicroSkin, RaceGuard)
Pro
~£65 new
The G-One RS is the fastest-rolling dedicated gravel race tyre available, combining a near-road-speed centre strip with confident side-knob cornering on loose surfaces.
700c / 622mm ETRTO fits standard gravel wheelsets; 40mm width suits typical gravel frame clearances of 42–50mm; tubeless-ready bead compatible with hookless and hooked rims
Runner-up: Pirelli Cinturato Gravel RC 700c x 40mm TLR
eBay?
Wheelset
Zipp 303 Firecrest Carbon Tubeless 700c (Centre-Lock, XDR, 12x100/12x142mm Thru-Axle)
Pro
~£2199 new
The 303 Firecrest is the benchmark aero-optimised gravel wheelset, with a 40mm deep hookless carbon rim proven at the highest level of gravel racing.
12x100mm front / 12x142mm rear thru-axle standard; XDR freehub body for SRAM 12-speed; Centre-Lock rotor interface; 700c fits gravel geometry
Runner-up: Hunt 4 Season Gravel Disc WideTube Carbon
eBay?
Brakes
SRAM RED AXS HRD Hydraulic Disc Brake Caliper Set (flat-mount, 160mm)
Pro
~£520 new
SRAM RED AXS HRD delivers the most powerful, modular and weight-optimised hydraulic disc performance available for gravel, with tool-free reach and contact adjustment.
Flat-mount caliper standard (IS-to-flat-mount adapter available for 160/180mm); compatible with mineral-oil-free DOT 5.1 fluid; pairs directly with RED AXS levers
Runner-up: Shimano GRX RX820 Di2 Hydraulic Disc Brake Set
eBay?
Chainset
SRAM RED AXS Quarq Power Meter DUB 40T 1x (172.5mm, DUB spindle)
Pro
~£899 new
The RED AXS Quarq combines a world-class integrated dual-sided power meter with a stiff, featherweight carbon spider — the ultimate 1x gravel crankset with actionable training data.
DUB spindle standard (24mm) fits DUB bottom bracket shells including BSA, PF30A and T47; 40T chainring pairs with 10-52T cassette for a 1x gravel-optimised gear range
Runner-up: Shimano GRX RX820 40T 1x Crankset 172.5mm
eBay?
Rear derailleur
SRAM RED AXS T-Type XPLR Eagle Rear Derailleur (UDH, 12-speed)
Pro
~£549 new
The RED XPLR T-Type is SRAM's finest wireless gravel-specific derailleur, combining the 12-52T Eagle range capacity with the refined road-feel shift quality of the RED group.
Requires UDH (Universal Derailleur Hanger) or includes adapter; 12-speed T-Type Flattop chain compatible; paired with XS-1299 cassette for full system optimisation
Runner-up: Shimano GRX RX822 Di2 12-speed Rear Derailleur
eBay?
Handlebars
Enve G Series Carbon Gravel Bar 46cm (31.8mm clamp, 12° flare)
Pro
~£349 new
The Enve G Series is the gold-standard gravel drop bar, offering an ergonomic multi-position flare and vibration-damping unidirectional carbon layup for all-day comfort on rough terrain.
31.8mm clamp diameter fits standard gravel stem clamps; 12° flare provides stable descending grip without sacrificing hoods position; compatible with all drop-bar brake/shift levers
Runner-up: Zipp SL-70 Ergo Carbon Handlebar 44cm
eBay?
Seatpost
Specialized S-Works Carbon Dropper Post 400mm x 27.2mm (100mm travel)
Pro
~£499 new
A carbon dropper post transforms gravel descending dynamics, and the S-Works version is the lightest, most reliable remote-actuated dropper available in the gravel-standard 27.2mm diameter.
27.2mm diameter (most common gravel frame standard); 400mm insertion length suits medium-to-large gravel frames; cable or remote-actuated compatible with SRAM AXS wireless lever
Runner-up: Enve Carbon Gravel Seatpost 27.2mm x 400mm
eBay?