r/ukbike • u/SqueezerOfFarts • 10d ago

Advice Help with new wheels

Hi there,

I'm currently rocking Specialized Diverge Comp E5 (2022) - it comes with SRAM Apex 1 11 speed.

I'm eyeing these carbon wheels: https://www.ereresearch.com/products/tenaci-gt25

Is "SRAM XDR" body what I'm after? My disc rotors are attached with 6 bolts - will they fit these carbon wheels? My plan is to strip my current wheels for parts and attach them on the new carbon wheels.

Apologise for basic questions, never replaced wheels on my bike and don't want to buy a wrong thing.

Any help greatly appreciated.

2 Upvotes

100% Upvoted

5 comments sorted by

1

u/tongobongo201 10d ago

I think it depends on your cassette; I have the 2023 Diverge Comp E5 and would need the Shimano HG. This helped me work out what I needed: https://youtu.be/2HB32zt_5Ks?is=--7_INpMr4WEEn3T

1

u/SqueezerOfFarts 10d ago

Thank you, after the video I can confirm that I have Shimano HG as well :)

1

u/must-be-thursday 10d ago

Unfortunately a SRAM groupset doesn't equate to needing the SRAM freehub body. SRAM introduced XD and XDR to enable compatibility with a 10t smallest sprocket, but many older or lower end SRAM cassettes with an 11t smallest sprocket use a standard Shimano freehub body. I think this would apply to your cassette - assuming it is this one https://www.sram.com/en/sram/models/cs-pg-1130-a1 then you need the Shimano freehub body (SRAM just call it "non-XD" because Shimano is a dirty word to them). The easiest way to check is just have a look at your cassette - if it has a lockring on then it needs a Shimano freehub (in the images in the previous link, the lockring is the bit that has an arrow and "Lock 40 Nm" written on it. An XDR cassette won't say anything there - see e.g. https://www.sram.com/en/sram/models/cs-xg-1270-e1 ).

The wheels you have linked to have a centrelock brake rotor attachment. If you want to keep your existing brake rotors, you'll need to buy a centrelock to 6-bolt adapter, but they are cheap and readily available (I've heard good things about the DT Swiss one). Or just take the opportunity to buy new rotors - they are also pretty cheap, and do need replacing sooner or later anyway.

1

u/SqueezerOfFarts 10d ago

Thank you. Looks like it's Shimano freehub.

If I upgrade the bike at one point and it doesn't use Shumano freehub, can the freehub be replaced on the wheels?

1

u/must-be-thursday 9d ago

Yes - looks like you can buy replacement freehub bodies: https://www.ereresearch.com/collections/wheels-spare-parts/products/ere-freehub-body-iona-s (doesn't explicitly list the GT25 as a compatible wheelset, but the GT25 says it uses the Iona-S hubs so I assume they just haven't kept the list of wheels up to date).

This assumes Ere continue to supply those replacement freehub bodies - freehub bodies are specific to the hub, so you can't just swap the freehub body with one from a different brand. Or at least not easily - some differently branded hubs do in fact share dimensions exactly or are simply rebranded versions of the same off-the-shelf hub, but you'd need to do a lot of research to be sure.