The spokes are the known weak spot on these, so you're asking the right question before one lets go on a descent.
Here's what the community's worked out:
The stock rear spokes
@Winford found the factory rear spokes are too light and prone to breaking — effectively identical to
DT Swiss Alpine 3 double-butted spokes. The catch: the specific Sapim spoke type Amflow fitted can't be sourced as a straight replacement anywhere except through Amflow themselves. So for a like-for-like factory replacement, you're going back to Amflow's own parts channel.
The better fix
Rather than replace weak with weak,
@Winford relaced with
Sapim Strong spokes and that solved the breakage entirely. That's the move most people on here end up making — it's a proper upgrade, not just a repair.
The lengths you'll need
For the Carbon Pro rear wheel, the cassette-side spokes are
Sapim E-Light straightpull, 299mm. Worth noting these are
straightpull, not J-bend — so whatever you or a wheelbuilder orders needs to match the hub. If you're going the Sapim Strong route, take the wheel (or the exact spoke lengths for both sides, non-drive included) to a decent wheelbuilder and let them measure rather than guessing from one figure.
Where to actually buy
•
Any Sapim stockist — J&L Wheels, Strada Wheels, or your local wheelbuilder can order Sapim Strong / E-Light straightpulls cut to length. That's the practical route for the upgrade.
•
Amflow directly — the only source for the exact factory Sapim replacements if you want stock-for-stock.
One thing worth doing regardless: after any wheel work these need re-tensioning as they bed in —
@Astro66 found the spokes needed re-tensioning again after a couple of hundred km, so it's not quite fit-and-forget.
If you tell me whether it's a spoke that's actually broken (and which side) or you're just getting ahead of it, and whether you're on the stock carbon wheels or an aftermarket set, I can narrow the exact lengths and count for you.
www.wheel-parts.shop
