SHIMANO 105 ST-5700 105 Double Road STI Lever 10-Speed, Black, Left Hand, ST5700L

Product Information

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.

Compatible parts are now marked by a letter surrounded by a square box – simply put, if all of your components have the same stamped letter on them, they’ll work together. If you are running a 1x drivetrain with a regular-sized cassette (ie, 11-36t or smaller) or some 2x mountain bike drivetrains with a similarly sized cassette, you may want to use a medium cage derailleur. 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.However, experience with Ultegra makes us worried that the shift will require more force as the cables age because of the extra bends from the under-tape routing. Nevertheless, these levers are the best value bit of road kit Shimano has ever made.

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. Campagnolo SRAM’s latest 12-speed eTap AXS road and MTB groupsets can be used together, setting up the option for ‘mullet builds’, which pair up road shifters with an Eagle AXS rear derailleur and a 10-50 cassette, for an ultra-wide gravel bike build. The shape of the shifters has been re-vamped and brought into line with the slimmer, more streamlined Ultegra R8000 series. Further attention has been paid to the ergonomics by increasing the reach adjustment to 15mm, offering more range for those with smaller hands. This attention to ergonomics should offer greater comfort on those longer rides. We all liked the new shaped hoods and the internal cable routing makes for a cleaner looking front end, at the expense of some under tape bulges and a slight increase in friction – despite the new PTFE lined cables. 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.Current 9-speed Shimano mountain bike components are compatible with older 9-speed road and mountain bike components, excluding the aforementioned exception All 12-speed Shimano mountain bike components are inter-compatible – you could, for example, use an SLX M7120 derailleur with an XTR M9100 trigger shifter There are also differences in the pull ratios used between different groupsets: the Ergopower shifters used by mechanical Super Record, Record and Chorus 11-speed are not compatible with Potenza, which itself is incompatible with both Ergopower and Centaur Power-Shift systems. Although SRAM, Shimano and Campagnolo’s interpretations of a clutch derailleur differ slightly, they all aim to achieve the same thing.