The situation is a little more clear with SRAM and we’ve summarised the main points below. SRAM road and gravel derailleur compatibility Almost all modern mountain bike derailleurs (and Shimano’s GRX gravel groupsets, Ultegra RX rear derailleur, Campagnolo Ekar, SRAM’s single-ring road groupsets and eTap AXS 12-speed road rear derailleurs) include a clutch mechanism. Shimano’s latest XT Di2 M8150 12-speed rear derailleurs are designed for electric mountain bikes and are not compatible with non-assisted bikes

speed road components (except and 10-speed GRX gravel and Tiagra 4700 – notes below) are inter-compatible. You could, for example, use an old Ultegra 6700 derailleur with old 105 5700 shifters Now we’ve determined the speed, brand and compatibility of your derailleur, you must work out the cage length that your drivetrain requires: long, short or medium.Deore XT rear derailleur delivers reliable and precise shifting with a stiff and lightweight open design With clutch derailleurs offering a quieter and more reliable drivetrain, there are few compelling reasons not to buy a clutch derailleur for a mountain bike. What do I get with a more expensive derailleur? speed SRAM components are inter-compatible, regardless of whether they are road or mountain bike parts – for example, you could run road shifters with a mountain bike rear derailleur

There are two common situations where there may be a large range, or spread, of gears on your bike – when using a super-wide range cassette (eg, 10-42t or larger) or when there is a large difference between chainring sizes (eg, when using a triple chainset). 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 Although SRAM, Shimano and Campagnolo’s interpretations of a clutch derailleur differ slightly, they all aim to achieve the same thing. Apart from first-generation Dura-Ace Di2, which uses a different wiring harness, the second (11-speed) generations are inter-compatible, across road, gravel and mountain bike groupsets as they all use the SD50 wires and share the same electronics. The main difference you’ll find between road bike and MBT derailleur is the length of the rear derailleur component. Mountain bikes have lower and wider spaced gears usually and this means the rear derailleur needs to be able to handle a bigger span in change length than standard road bike derailleur Bike Derailleurs at Decathlon

Shimano 105 R7000 11 Speed Rear Derailleur

If you wish to return your bike to us please keep it in the box it arrived in and call us on 01772 644340 and we will arrange a collection. 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. For clarity, 10-, 11- and 12-speed Shimano road/gravel and mountain bike components are not inter-compatible with each other. This is because they use different cable pull ratios

Campagnolo has introduced many changes to its groupsets, resulting in reduced compatibility between generations. So boxed letters (indicating the ranges) will aid you in identifying if your parts are compatible. However, things get much easier with its latest 12-speed road groupsets. You can mix and match components between Chorus, Record and Super-Record. All 11-speed Shimano road components are inter-compatible – you could use a Dura-Ace R9100 derailleur with a pair of 105 R7000 shifters. This is also true of the brand’s 11-speed GRX components You should always keep proof of postage and we advise you to use a ‘signed for service’ when returning goods.The granting of a best price is not combinable with other promotions (e.g. "free articles) from Bike-Discount. 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. The Shimano Deore XT SGS M771 Rear Mech delivers reliable and precise shifting with a stiff All-alloy and lightweight construction without compromising strength and durability. 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.