Clutch-equipped rear derailleurs were once the sole preserve of mountain bike offerings, but are now seen on both gravel and road groupsets from Shimano and SRAM. Matthew Loveridge / Immediate Media Campagnolo provides a much more thorough description of the changes and we highly recommend you read through this guide carefully before committing to any new parts from the Italian marque.

Now that we’ve gone through the tortuous process of working out exactly what will work with your drivetrain, you have the fun of deciding which price point to go for. Campagnolo’s Super Record EPS electronic groupset is now onto its fourth generation. Matthew Loveridge / Immediate Media While the derailleurs will work, chainlines differ between GRX, Shimano’s road groupsets and its mountain bike groupsets.The current 12-speed generation of Shimano electronic groupsets have inter-compatible wiring and electronics and use the newer SD300 wire variant.

A clutch derailleur essentially increases the resistance this pivot provides – either through a clutch or more complex electro-hydraulic systems, as seen on SRAM AXS – resisting fore and aft movement of the derailleur cage, and making for a far quieter and more reliable drivetrain. and 9-speed SRAM components are all inter-compatible, regardless of whether they are road or mountain bike parts However, SRAM’s Force AXS Wide groupset means you may not have to create your own mullet builds. Bridging the gap between road-going AXS groupsets and mullet builds, the groupset offers a lower bottom gear for road and a good range for gravel riding with cassettes up to 36 teeth, but does this by altering the drivetrain alignment. and 11-speed SRAM road components are inter-compatible – meaning you could run a 10-speed SRAM Red rear derailleur with a pair of SRAM 22 shifters

You should always keep proof of postage and we advise you to use a ‘signed for service’ when returning goods. The only exception for 9-speed groupsets is pre-1997 Dura-Ace gearing, which won’t play nicely with anything because it uses a totally different cable pull ratio