Analogue Help - Trek X Caliber 7 Conversion to SRAM 12 Speed single

[mooby77]

Hi guys ,
Getting my Trek X Caliber 7 2020 back together , converting from the stock 2 X9 Shimano Alivio to SRAM Eagle 12 speed.

All going well today , all the old taken off, New bottom bracket and crankset on , rear mech on , shifter , but then tried to fit the cassette and not so good , It is a std Shimano HG free hub , took the old cassette off , fitted the new one on , tried to tighten down and it would go so far tight , then kind of bottom out and come loose again, tried a few times the same

Put the wheel back on the bike with the SRAM cassette fitted like that just to see and then it seems to rub when I span the wheel , so took it back off , the cassette had some play in it as obviously something not right.

I'm sure the SRAM cassette is compatible with STD HG Shimano hub , so it probably something I am doing wrong (as usual) or a dodgy cassette maybe.

Any ideas .

Cheers

Paul

 

[mooby77]

Hi guys ,
Getting my Trek X Caliber 7 2020 back together , converting from the stock 2 X9 Shimano Alivio to SRAM Eagle 12 speed.

All going well today , all the old taken off, New bottom bracket and crankset on , rear mech on , shifter , but then tried to fit the cassette and not so good , It is a std Shimano HG free hub , took the old cassette off , fitted the new one on , tried to tighten down and it would go so far tight , then kind of bottom out and come loose again, tried a few times the same

Put the wheel back on the bike with the SRAM cassette fitted like that just to see and then it seems to rub when I span the wheel , so took it back off , the cassette had some play in it as obviously something not right.

I'm sure the SRAM cassette is compatible with STD HG Shimano hub , so it probably something I am doing wrong (as usual) or a dodgy cassette maybe.

Any ideas .

Cheers

Paul

Boost , any ideas , much appreciated

 

[Cb750stu]

What SRAM cassette is it , NX is standard Shimano HG fitment I think but others you will need a SRAM XD driver on your hub

 

[mooby77]

What SRAM cassette is it , NX is standard Shimano HG fitment I think but others you will need a SRAM XD driver on your hub

NX, Fits on hub splines no problem

 

[Cb750stu]

Do you have this cassette ??

 

[mooby77]

Are you 100% sure you have the correct SRAM NX 12 speed cassette for Shimano HG hub? with 11 tooth smallest cog ?
There is a boost and non-boost version of the groupset, but I think the only difference is in the chain line of the crankset.
cassette should fit.

If you absolutely have the correct cassette, make sure the freehub is meticulously clean, i.e no detritus preventing it seating properly.

Hi , yes , it has the 11 tooth smallest , it is boost version , which i believe is correct for my bike per
Rear Hub:
Formula DC-2241, alloy, 6-bolt, Shimano 8/9/10 freehub, Boost141, 5 mm QR, do I need a spacer ?

 

[mooby77]

Do you have this cassette ??

Yes I have the PG 1230

 

[Cb750stu]

Hi , yes , it has the 11 tooth smallest , it is boost version , which i believe is correct for my bike per
Rear Hub:
Formula DC-2241, alloy, 6-bolt, Shimano 8/9/10 freehub, Boost141, 5 mm QR, do I need a spacer ?

Tbh I've never heard of Boost 141 I've always had 148 , if the cassette is moving on the freehub when it's tightened you possibly need a spacer at the back of the cassette ?

 

[Cb750stu]

Tbh I've never heard of Boost 141 I've always had 148 , if the cassette is moving on the freehub when it's tightened you possibly need a spacer at the back of the cassette ?

If you have the old cassette try installing one of the old black spacers on the freehub then install cassette and tighten ??

 

[mooby77]

Check this video out, particularly reference to the rear spacer at about 3:40

Best of luck

SRAM 12 Speed Conversion (Shimano Hub)! - YouTube

Thanks Kilham5 , yes looks like I need a spacer , although there was not one on the original cassette , but of course different size, I'll see what spacers I have , if not ebay, amazon here I come , or the LBS

 

[mooby77]

If you have the old cassette try installing one of the old black spacers on the freehub then install cassette and tighten ??

Many thanks , going to start with a 1mm spacer and then move up as needed, see if that fixes the issue.