Rear wheel flex. .. How to stop ?
Think this one has come up before and this link got shared by someone…
Not a quick answer and it’s pretty road focussed, but nice and geeky… 🙂Posted 6 months agoAlasdairMcMember
I agree with fasthaggis. If everything else is the same, the build is the problem.
Do you have much tyre clearance? Is it genuinely wheel movement or could the tyre be rolling on the rim? How big are the tyres you’re running? Any movement in the dropouts or the hub bearings? Can you flex the wheel by hand?Posted 6 months ago
I had my rear wheel rebuilt after hope sent me a new hub and it feels really flexy. Almost like the tyre pressure is low.
I can also see where the wheel has flexed and the tyre has rubbed on the frame.
Its a hope pro 2evo , DT double butted spokes and a wtb i23 rim. 29er btw.
Would a change to straight spokes help or a stronger rim ?Posted 6 months ago
I don’t know how flexy it was before as I bought the wheels secondhand from here and found the hub cracked straight away.
I meant would plain guage spokes be stronger than double butted.
Wheel is built fine. The builder is quite well known in the area for his wheel builds. All spokes are correct tension etc.
I can flex the wheel a bit by hand. The tyre is a 2.3 with plenty of clearance.Posted 6 months agodeadkennySubscriber
Is it definitely the wheel flexing? Not the frame, or the hub is not right?
Also is the tyre on straight? Had tyre rub the frame before because they just weren’t seated right and had excess wobble. The wheel was perfectly true though. Though if it feels flexy I guess it’s less likely, unless it’s not seated right at all and thus squirming a lot.Posted 6 months ago
I’m not convinced the frame is flexing either as it’s built like a tank.
Just because something looks ‘clydebuilt’ does not mean it is stiff.
Try a different wheel in there, either that, or just do as you usually do – come on here, ask a question, get lots of helpful advice and ignore it, as it’s not what you want to hear.Posted 6 months agoBearBackMember
1.8 1.5 1.8, what spoke is this, revolutions? That guage would be a race day weight weeinie spoke surely.Posted 6 months ago
2.0/1.8/2.0 competitions would be good and DT rate a 28hole xm spline wheelset to 120kg. 32h sees you plenty strong for 110kg. I have a similar weight pal rinding my old 32h xm471/204/competition build and its the first set of wheels that he’s ever found to be stiff.amediasSubscriber
I weigh 35kg less than you and I only use 1.8/1.5 spokes on my lightweight race wheels.
Wouldn’t dream of anything that light on a general trail bike even for me. I hope it’s not a low spoke count wheel too…
Go back to the builder and ask for advice on a build for your weight and riding. There’s nothing wrong with being heavy, but there is something wrong with using inappropriate components for your weight.Posted 6 months ago
Would the rim be strong enough then do you think ?
I’m sure it’s a 32 hole rim and hub.
The wheel builder did comment on the spokes when he was building it as they were the spokes from the previous build.
I will go and ask his advice and see what he says.
Cheers.Posted 6 months agobowglieSubscriber
I had similar problems with my first 29er (a hardtail). I’m about 86kg with full winter kit on, and tried some Pro2 + Crest wheels on there. Trail centre reds were mostly OK, but on rougher natural rides it felt like the rear axle was loose – it wasn’t, it was the rim flexing. Swapped to Arch EX’s with same hubs and spoke type, and that solved the problem.
If you want a decent quality stiff rim, I can recommend the latest 25 & 30mm internal width DT stuff – have some of the 30’s on my long travel 29 and they are brilliant. No flex, but not harsh with it either.Posted 6 months ago
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