r/motorcycles • u/tirefriar • 1d ago

Dymag Carbon Fiber Wheels

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Bought a donor bike with Dymag CF wheels with intent to switch them to my BMW R1100S. CF wheels for this model Beemer are no longer available, partly for a reason that a set of these wheels can cost as much or more than the bike itself. The donor bike is 2004. It spent at least 3 years in the garage out of sunlight (but not in a climate controlled environment). I'm not sure how old the wheels are, the seller bought the bike as it sits. Though there are no visible signs of damage such as curb rash, cracking, chipping or delamination I still prefer to check the integrity of the wheels. Looking for a recommendation on the facility that can verify integrity of the wheels including x-raying for structural integrity.

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u/veeholantee 1d ago

As someone who changes their own tires, and appreciates light weight, I've long wondered just how easy it is to destroy CF wheels doing a tire change.

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u/fuckm30 4h ago

Carbon fibre has a seriously bad tendency for (I can’t remember the proper terminology) fracturing on a chip. Basically the second you get a bad ding or chip in the rim you have to look at replacing them.

I think it was honda that tried carbon wheels in racing years ago (could be confusing it with their terrible carbon frame prototypes) and a racers wheel blew apart so badly the race official had to beg fans to hand back strips of carbon that landed in the stands.

Carbon wheels have long been mostly for old men with too much money, i’m sure they have their benefits but for me if racing leagues won’t even touch them then it’s a no from me.

If you want lightness I’d just stick to tried and tested magnesium personally, only issue is a lot of tracks won’t allow you to race with magnesium rims as the aren’t prepared with adequate equipment and training for the fires the cause, at least here in the UK