????? Sram axs whether original or Transmission are completely independent systems......nothing in the motor determines or affects how gear shifting is achieved...... whether cable or electronic.
SRAM T-type cassette worn out after 940 miles
- Thread starter Pazman
- Start date
The difference being a T type chain rollers are a larger diameter than on an Eagle chain but the pitch is the same.....so only the T type chain checkers will be accurate on a T type chain
sethimus
😠 Temu Gary 😠
and there is no official chain gauge from sram, only one for eagle and below. go figure why
--> you are supposed to run the system to the ground
apart from Park tool CC4.2, or Pedros chain Checker, or SRAM's CHTL8058000
these measure the distance between the backside of 2 rollers rather than between 2 rollers...hence the thickness of the rollers makes no difference to its measurement.
an "old" one will under measure
sethimus
😠 Temu Gary 😠
the first 2 are 3rd party (hint: no official SRAM product), the CHTL8058000 is for all SRAM chains that need to get changed after 0.8% elongation (hint: all chains but t-type)
you are welcome
Shimano only not sram
John_likes_bikes
Well-known member
I had a GX t type chain break into 3 pieces after 150 miles and a GX cassette creak like my old knees in the morning after 225, probably due to loose or loosening pins. Upgrading both to XO and hoping for a better result. The torque emtbs create is so much higher, these are the few parts that actually deserve emtb specific ones.
I am now riding Transmission XX 3000 kilometers and everything looks like new. Even the chain is still within tolerance, despite a lot of mud and rough terrain. At the time, it was an experiment for me to take the most expensive components for a change. But when I look at it now, it actually seems to be worth it.
FlightDeck
Member
You're on the money here. I do similar with all my bikes but have three chains that get hot waxed and rotated. Road bikes rotate every 350 km and eMTB gets rotated every 120-160 km dependant on conditions. All chains get wiped down with microfibres cloth after riding in the dry (Main conditions I ride in where I live) and after riding in the wet all chains get rinsed clean with water and dried.
Did you comprehend the whole Shimano aspect of my statement?
But as far as Ttype goes you are dead wrong. The motor is connected to the shifting and it is not independent. Probably came out after you made your post.
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The problem here is the new Ebike power output is overkill for Ttype chains and cassettes.
I wear out cassettes long before the chain ever gets worn. The last 10 chains ive gone through, and not one of them was out of spec.
If you are an eco warrior or ride slow, yes you can get stupid miles out of a cassette to the point you may war out a chain.
If you ride aggressively with a strong Ebike you will wear out the cassette first. That means cleaning the chain perfectly, and hot waxing every two rides. Right now cassettes are only lasting between 200-600 miles. One or two got to 900 miles. Only one cassette stopped hopping chains with a new replacement chain.
I f
Sram Transmission is different and I am yet to experience personally, or get much feedback on it. The cassette profile is different and T Type chains retain standard pitch but have larger diameter rollers. The difference the T Type design makes is that gear change can be made under load....in fact gear change is actually better under load most of the time. SRAM says TType chains and cassettes wear together so it recommends running both until slippage starts to occur, and then change both. Due to the larger roller diameter you also need a compatible chain wear checker.
There has of course been a big increase in motor power recently so it will be interesting to see the impact of that on drivetrains.
My only personal experience with AXS Transmission is 450 miles on a bosch cx gen 4 with zero measureable chain wear....thats with XS 1275 cassette and GX chain. I have XS 1270 on a Bosch gen5 bike but not enough miles on that to make any judgements. The 1270 does however have a replaceable small cogs section rather than being fully pinned.
I find all of that contrary to the experience of what riders have posted here....including my own. Leaving T Type to one side, most riders say they expect c 500 to 700 miles for a chain up to 0 5% stretch......then 2 or sometimes 3 chains before a cassette nerds changing. Of course there are variables which include differing trail conditions, drivetrain maintenance methods, the spec of the cassette and chains used, and how any rider uses the drivetrain.
Sram Transmission is different and I am yet to experience personally, or get much feedback on it. The cassette profile is different and T Type chains retain standard pitch but have larger diameter rollers. The difference the T Type design makes is that gear change can be made under load....in fact gear change is actually better under load most of the time. SRAM says TType chains and cassettes wear together so it recommends running both until slippage starts to occur, and then change both. Due to the larger roller diameter you also need a compatible chain wear checker.
There has of course been a big increase in motor power recently so it will be interesting to see the impact of that on drivetrains.
My only personal experience with AXS Transmission is 450 miles on a bosch cx gen 4 with zero measureable chain wear....thats with XS 1275 cassette and GX chain. I have XS 1270 on a Bosch gen5 bike but not enough miles on that to make any judgements. The 1270 does however have a replaceable small cogs section rather than being fully pinned.
It is my belief that reducing wear and tear on the drivetrain is reduced if you ride with "mechanical sympathy". That means using the gears to keep cadence above 65 with light pressure on the cranks. The assistance provided by the motor is likely to be a great deal more progressive than rider input to the cranks, so using a suitably tuned mode that keeps pedal pressure fairly low is best in my opinion. For those that insist on riding in ECO I believe that is just putting undue strain on the drivetrain..........we are ( mostly) after all riding comparatively heavy full suspension bikes! Obviously cleaning and lubing the drivetrain is also important. A lot of emphasis is placed on different lubes, but actually very little lube is required and I dont think there is much difference between them. Far more important is keeping the drivetrain clean. the majority of wear due to friction occurs between the rollers and pins so using a cleaning method that gets rid of dust /dirt etc in those areas is key.
A chain also loses lateral stiffness over time partly due to the roller/pin wear but also due to "aggressive" gear changes. That loss of lateral stiffness impacts on the mech guide wheel ( upper jockey) required distance from the cassette cogs. Pre T Type mechs may need B tension screw adjustment when that happens. T Type has no B tension adjustment or end stop screws..........but if it is AXS micro adjustments can be made in the AXS app or by using the changer pod with the side button held in whiclst the chain is on the 2nd largest cog.
In support of your reference to lateral stiffness, I point you to the following thread. (You may remember it anyway).
https://www.emtbforums.com/threads/rumbling-noise-chain-ring-or-motor-bearings.44441/#post-646856
In summary I had a rumbling noise on the bike. Turned out to be the chain, which was measured over 100 links at 0.3% stretch, but that was over 1500 miles and to be fair that chain did look a bit past its best! So I measured side flex vs a new chain. the pic below was in the above thread.
sethimus
😠 Temu Gary 😠
there’s a tool for that:
www.abbeybiketools.com
LL Chain Wear Tool
Chain wear has become a little more complicated ever since 1x drivetrains have gained popularity. These drivetrains are designed to cross chain, something most of us were taught to avoid when we started riding bikes as a serious endeavor. Add to that the variables that flat top chains have...
www.abbeybiketools.com
Well that does not leave you with much ammo for the discussion.
The new motors are running 150nm and 1500w and im running 1000w 120nm. And it flat tears up your gear if you ride hard.
last two years i almost rode professionally. Meaning I lived to ride. 9500+ miles and 1,300,000' in elevation. This year I took it easier.
My Shimano rig is 600w and 85nm and on the Shimano cassettes I would get 1000-2000 miles and to this day I never had a chain get beyond spec using the park tool chain checker. On that rig only one cassette took a second chain and only got me 300-400 more miles.
But all that was running at race pace for 50 miles, full power each week ish.
100% what im seeing. The chains start falling apart, and ill break multiple links when they get like that. But still in spec
Yes the majority of emtbs are supplied with 1x12 but that does not mean you have to use all the gears. I never use gear 1 ( largest cog) and rarely use gear 12 except if I have to do a tarmac section to get to a trail. So effectively I turn 1x12 into 1x10, and the majority of the time probably 1x8there’s a tool for that:
LL Chain Wear Tool
Chain wear has become a little more complicated ever since 1x drivetrains have gained popularity. These drivetrains are designed to cross chain, something most of us were taught to avoid when we started riding bikes as a serious endeavor. Add to that the variables that flat top chains have...
sethimus
😠 Temu Gary 😠
silverstone
Active member
I was just about to give exactly the same example. But why on earth did he use up 6 chains on 3 cassettes?? Because he says exactly the same thing otherwise – that you should never change the chain separately on a T-Type derailleur.
19 brake pads to 23 rear tyres
I’ve got exactly the same ratio at the moment 
19 brake pads to 23 rear tyres
I’ve got exactly the same ratio at the moment Ha ha
geriatrics riding 4600 miles a year and climbing 675,000'Call me what ever you want boy! Just dont call me late for dinner
Really does not apply Einstein, you are brilliant! Chairlifts up and not much peddling down, no wonder his cassettes last forever.
Im sorry you are so slow, I really do wish the best for you. I also figured out why I was seeing 600 miles out of the last 2 cassettes, the Sram AXS cage arm, needle bearings got trashed in 11 months of use, and I lost tension on the chain causing issues.
I "now" highly recommend people buy the tamper proof hex set, and clean and lubricate the needle bearings every 1000 miles. Or you will be replacing the $150 arm every 1500 miles or so.
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Chair lift up, and coasting down more than peddling. But they still have practice days, and not all rides are in parks. Still not really apples to apples.
Yes and no, most of the time I dont. But he on time I did, i got close to another 200-300 miles out of it.
Hopefully with a new cage arm keeping proper chain tension ill start getting close to a 1000 miles again.
sethimus
😠 Temu Gary 😠
do you have problems with the metric system?Ha ha
Call me what ever you want boy! Just dont call me late for dinner
Really does not apply Einstein, you are brilliant! Chairlifts up and not much peddling down, no wonder his cassettes last forever.
Im sorry you are so slow, I really do wish the best for you. I also figured out why I was seeing 600 miles out of the last 2 cassettes, the Sram AXS cage arm, needle bearings got trashed in 11 months of use, and I lost tension on the chain causing issues.
I "now" highly recommend people buy the tamper proof hex set, and clean and lubricate the needle bearings every 1000 miles. Or you will be replacing the $150 arm every 1500 miles or so.
thats 8852 miles and 1706036ft climbing? no one said anything about using chairlifts. , old man. learn to read.
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sethimus
😠 Temu Gary 😠
what did you not understand when i posted „former“? dude owns unno these days, as well as felt and an engineering company. still rides harder than you in your wildest dreams…
You do not have a clue snail boy.
That is Cesars bike and he mainly commutes with it. He is not punishing it. His fast days are long behind him.
But keep crying, I like your style
sethimus
😠 Temu Gary 😠
UNNO on Instagram: "One of those “hard days” at UNNO. @cesarrojo getting chased by @pablothebikevillage while testing new suspension at @lasorrera_bikepark High speed, big jumps… the MITH feels right at home. One of the best things about the @avino
264 likes, 6 comments - rideunno on January 21, 2026: "One of those “hard days” at UNNO. @cesarrojo getting chased by @pablothebikevillage while testing new suspension at @lasorrera_bikepark High speed, big jumps… the MITH feels right at home. One of the best things about the @avinoxebike...
www.instagram.com
you know where andorra is, and where barcelona? he does everything with the same bike, not just commuting… and i bet his commute is a lot more fun the most other‘s, just look at all those trails in the hills behind barcelona on trailforks, behind he lives accord to the pinkbike article. so most probably commuting on dirt and/or trails.
anyways, the strain on a drivetrain when you commute every day has in every weather is hard wearing. so still a good indicator on how good one shifts if stuff lasts longer.
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