# Anyone using the KMC X12 chain on a SRAM Drivetrain? **URL:** \ **Category:** Equipment\ **Created:** [July 18, 2025, 12:25pm UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581 "2025-07-18T12:25:11Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Caveman](https://avatars.discourse-cdn.com/v4/letter/c/58956e/32.png) [@Caveman](https://www.trainerroad.com/forum/u/Caveman)\ **Post date:** [July 18, 2025, 12:25pm UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/1 "2025-07-18T12:25:11Z")
I am not unhappy with Flattop chains but options are always good. ---
**Author:** ![Saddlesaur](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/saddlesaur/32/33237_2.png) [@Saddlesaur](https://www.trainerroad.com/forum/u/Saddlesaur)\ **Post date:** [July 18, 2025, 1:43pm UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/2 "2025-07-18T13:43:17Z")
KMC say their X12 is not compatible with flat-top chain drivetrains, which have slightly bigger rollers than other chains. I think I read somewhere that they will soon have a flat top compatible chain. ---
**Author:** ![Caveman](https://avatars.discourse-cdn.com/v4/letter/c/58956e/32.png) [@Caveman](https://www.trainerroad.com/forum/u/Caveman)\ **Post date:** [July 18, 2025, 5:20pm UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/3 "2025-07-18T17:20:50Z")
KMC claims compatibility with all major 12 speed drivetrains so wondered if anyone was using it and their feedback. ---
**Author:** ![Greenswim](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/greenswim/32/18218_2.png) [@Greenswim](https://www.trainerroad.com/forum/u/Greenswim)\ **Post date:** [July 18, 2025, 8:36pm UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/4 "2025-07-18T20:36:37Z")
I use one a waxed one for racing and I can’t determine any difference. It is short term use so unaware of the wear. ---
**Author:** ![Saddlesaur](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/saddlesaur/32/33237_2.png) [@Saddlesaur](https://www.trainerroad.com/forum/u/Saddlesaur)\ **Post date:** [July 18, 2025, 9:32pm UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/6 "2025-07-18T21:32:23Z")
Here’s a cut and paste from KMC’s X12 webpage: “Compatibility: SRAM Eagle, SRAM Eagle AXS, Shimano, and Campagnolo Bicycle Type: MTB, Road, Gravel, Cyclocross \*Not Compatible with SRAM eTAP and Flattop” ---
**Author:** ![Aquazepp](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/aquazepp/32/64458_2.png) [@Aquazepp](https://www.trainerroad.com/forum/u/Aquazepp)\ **Post date:** [July 19, 2025, 5:30pm UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/7 "2025-07-19T17:30:11Z")
I have a KMC x12 chain on my TT bike running SRAM Red Etap 1x. It works excellently. ---
**Author:** ![Majoeric](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/majoeric/32/166482_2.png) [@Majoeric](https://www.trainerroad.com/forum/u/Majoeric)\ **Post date:** [July 19, 2025, 11:45pm UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/8 "2025-07-19T23:45:29Z")
I have numerous x12 chains on my sram and shimano 12spd drivetrains. Although, I’m unsure if they will work on a t-type setup. 🙂 ---
**Author:** ![Aeroskiii](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/aeroskiii/32/142972_2.png) [@Aeroskiii](https://www.trainerroad.com/forum/u/Aeroskiii)\ **Post date:** [July 20, 2025, 3:30am UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/9 "2025-07-20T03:30:38Z")
Just use the Gx Chain if you are worried about friction, faster according to ceramicspeed ---
**Author:** ![K42](https://avatars.discourse-cdn.com/v4/letter/k/6de8d8/32.png) [@K42](https://www.trainerroad.com/forum/u/K42)\ **Post date:** [July 20, 2025, 5:58am UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/10 "2025-07-20T05:58:06Z")
Why are you unhappy with the flattop chains? ---
**Author:** ![GeordieMullet](https://avatars.discourse-cdn.com/v4/letter/g/94ad74/32.png) [@GeordieMullet](https://www.trainerroad.com/forum/u/GeordieMullet)\ **Post date:** [July 20, 2025, 5:45pm UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/11 "2025-07-20T17:45:42Z")
They’re not gold 🪙 ---
**Author:** ![Aeroskiii](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/aeroskiii/32/142972_2.png) [@Aeroskiii](https://www.trainerroad.com/forum/u/Aeroskiii)\ **Post date:** [July 21, 2025, 6:05pm UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/12 "2025-07-21T18:05:52Z")
they test a couple watts slower. also more expensive. dura ace/xtr chains are elite but shimano cassettes arent one peice and their derrailleurs are super ugly. ---
**Author:** ![kervelo](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/kervelo/32/143552_2.png) [@kervelo](https://www.trainerroad.com/forum/u/kervelo)\ **Post date:** [July 22, 2025, 5:01am UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/13 "2025-07-22T05:01:12Z")
KMC have the X Flat chain for the SRAM 12sp/13sp systems. For some reason there is not much information available of the chain. > **[KMC - Products - X FLAT Silver](https://www.kmcchain.eu/products/x-flat-silver)** ---
**Author:** ![GeordieMullet](https://avatars.discourse-cdn.com/v4/letter/g/94ad74/32.png) [@GeordieMullet](https://www.trainerroad.com/forum/u/GeordieMullet)\ **Post date:** [July 22, 2025, 9:07am UTC](https://www.trainerroad.com/forum/t/anyone-using-the-kmc-x12-chain-on-a-sram-drivetrain/104581/14 "2025-07-22T09:07:09Z")
I didn’t know that KMC had released a flat top compatible chain. Thanks. I’ve ordered myself one from Merlin UK in gold. Though the green looks 🍀