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Groupsets

A complete road groupset includes shifters, derailleurs (front and rear), crankset, cassette, chain, and brakes. Buying as a set ensures compatibility and often works out cheaper than individual pieces. Shimano dominates the market with 105, Ultegra, and Dura-Ace. SRAM offers Rival, Force, and Red with AXS wireless electronic shifting. Campagnolo runs Chorus, Record, and Super Record with distinctively crisp shifting feel. Used groupsets represent exceptional value — a generation-old Ultegra outperforms current 105.

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Buying Guide

Road Groupset Buying Guide

Complete vs Partial Groupsets

Complete groupsets include everything: STI levers, front derailleur, rear derailleur, crankset, bottom bracket, cassette, chain, and brakes. Partial groupsets might exclude brakes (if upgrading from rim to disc) or the crankset (if keeping an existing one with a power meter). Buying complete is simplest for compatibility but partial groupsets let you keep specific components you prefer. Most used groupsets are sold as partials — sellers often keep power meter cranksets or favourite saddles.

Shimano Generations

Current 12-speed: R9200 (Dura-Ace), R8100 (Ultegra), R7100 (105) — all available in Di2 electronic. Previous 11-speed: R9100 (Dura-Ace), R8000 (Ultegra), R7000 (105), 4700 (Tiagra) — mechanical and Di2 for the top two. The R8000 Ultegra generation is arguably the best-value used groupset ever made: mechanical shifting is excellent, parts are abundant, and prices have dropped significantly with 12-speed adoption. R7000 105 is nearly identical in function at a lower price.

SRAM AXS

SRAM went all-in on wireless electronic with AXS. Red, Force, and Rival AXS all use the same wireless protocol with individual CR2032 or rechargeable batteries per derailleur. The system is remarkably reliable and easy to set up — no cables, no junction boxes. SRAM uses a flat-top chain design on 12-speed that's incompatible with Shimano or Campagnolo. The hoods are larger than Shimano, which suits riders with bigger hands. Used AXS derailleurs need battery door seal checks — if the seal degrades, water can enter.

Campagnolo

Campagnolo uses its own freehub body standard (N3W for 13-speed, older standards for 11/12), so switching to Campagnolo may require a new rear hub or freehub body. The shifting feel is distinctively crisp — thumb lever downshift, finger lever upshift — and many riders prefer it to Shimano or SRAM. Parts availability in the UK is more limited than Shimano but specialist dealers stock everything. Campagnolo Ekar is the only road-specific 1x13 groupset — purpose-built for gravel.

Buying Used Groupsets

Check wear on the holy trinity: chain stretch (0.5% is halfway, 0.75% is replacement), cassette tooth profiles (shark-finning means worn), and chainring teeth (hooked or thinned means worn). Electronic groupsets need firmware version checks and battery health assessment. Brake callipers: check piston seal condition on hydraulic brakes (sticky pistons indicate contaminated fluid). Cables and housing are consumables — assume you'll replace them on any used mechanical groupset. A well-maintained Ultegra R8000 or SRAM Force 22 groupset is a phenomenal used buy.