How would your tyre hit your crown?
Okay, I have now measured them. Can someone check I have measured the right bits.
The distance between the top of the tyre and the crwon is shown in green at 10.5cm.
The distance between the top of the fork bottom bits and the crown where they meet is 11cm.
I reckon this means that if I took all of the gubbins out of the forks the tyre would overlap with the crown by 0.5cm causing a load bang and projecting me in a graceful arc over the handlebars.
I also reckon that it is unlikely that all the gubbins inside the fork will get squashed to less than 0.5cm so I am probably safe. Remember I will not be doing road gaps or riding Jedi’s wood work.
Biffer – Forks are fine. I replaced the star fangled nut thing after about a month of riding without a bolt in it. People kept giving me strange looks when they saw me riding without the top cap or tensioning bolt.Posted 9 years agocoffeekingMember
If your forks could travel the full length of your stanchions then yes, you’d have a tyre impact but I’ll bet my bottom dollar the full length of the stanchions is not used. Fairly sure mine stop with about 10mm to spare, only way to find out for sure is to compress the fork fully, or measure from the top of you seal upwards by the number of mm travel your fork claims.Posted 9 years ago
South of England doesn’t have hills. It is rollytastic round Swinley. Lordwood and the New Forest. I don’t do climbs, I do walking if it gets steep and there is lock down on the forks if needed. Not sure what you mean about ‘vague’ on descents. It doesnlt seem to have slowed me.Posted 9 years agoI_AcheMember
You do realise that after all of this messing around on ‘tinternet and measuring things taking photos and messing around with them then uploading them and finally posting them just to get an answer has taken longer than it would take for me to drive from Birmingham realise the air from your forks and check if the tyre would hit then fix your puncture and drive back to Birmingham.
Sorry for the lack of punctuation.Posted 9 years agojames-oMember
“I guess I am safe” maybe not, something else to consider –
the leverage on the crown area is increased when you fit 29″ wheels to 26″ forks – the radius is larger so the leverage is higher than the manufacturer may have factored in. Fox recently put out a notice warning about the danger of doing this, and although there is a saftey margin built into the design of all bike parts, you shouldn’t risk having the crown seperate from steerer or stanchions.
Your risk, but i couldn’t ride that set up hard with confidence.Posted 9 years agomboySubscriber
As I was the one that brought about the worry in the first place WCA, should probably chip in with the measurements you’ve given for everything, and the knowledge that your forks can’t get within 15mm of use of the full stanchion length showing, you *should* be fine even under full compression running this wheel. Though if the wheel deflects because of a hard hit (they do this you know!), it could be tyre into the brace time which would equal instant stoppage!
*I do not take any lawful responsibility should anything bad happen!
As others have said though, there’s lots of reasons not to do it. I can understand your thinking that where you’re riding, it should be fine for the most part as they’re not that hilly trails etc. Personally, I’d want some bloody mud room between my tyre and the fork brace. I’ve managed to stop a 2″ front tyre rotating inside a fork with loads of mud clearance, due to the ridiculously gloopy mud we get where I live. Not a problem now I’m running upside down forks at least!
Oh, and I also don’t like running silly thin tyres, especially not on the front. If you’re riding Afan at the weekend, and haven’t done so before, I’d fix the puncture on your 26″ wheel and slap it back in personally! To me a 2″ tyre is narrow though, I like a bit of cushioning, and we’re all different.Posted 9 years ago
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