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I've got some 29er, 21mm internal width rims which I think could take tyres up to around 2.7 inch wide. Does anyone do anything like that or is there a gap between your sort of widish standard tyres at around 2.4 inch up to the 3 inch + size type tyres?
Cheers,
Mike
Minion DHF 2.5
21mm is pretty narrow still, I wouldn't want to go above 2.35 Schwalbe on them. Actually the 2.35 Mary's and HD don't feel great on my 22.5mm rims.
2.7 tyres are gonna be floppy as hell on those.
The 2.5 Minion DHF is a great tyre, it's not gonna be great on your rims though.
The big tyre/narrow rim thing sort defeats the point of having the big tyre as you can't run them at low enough pressures without them getting all roley/burpy.Just gone to 30mm wide rims meself.
Cheers for the replies. All makes reasonable sense. I got a bit ahead of myself building wheels and then changing my mind on a frame. 2.2 Ikons look really skinny on the front of a Stooge! Doesn't look like there is anything in an in between size anyway. Will see how it goes as is, then might try a 2.3 or 2.4 inch and then might rebuild the wheel with something wide enough for proper plus size later on.
Excuse my ignorance, but were mavic 721s (21mm inner width) not the go to dh rim in years gone by and regularly run with maxxis 2.5 inch tyres? I definitely ran them and thought they were fine and didn't suffer from floppyness
Rims measured by rulers, tyres by magic...
2 maxxis tyres of the same quoted size on the same rim look different.
For dh I was running the 23-25mm mavic rims years ago.
Do we need a new tyre size category?
I have 21mm rims running 2.3 Race Kings which are highish volume and they don't feel great at lower pressures. They already look too big for the rim so wouldn't want any bigger.
Probably going to rebuild the wheels with some 30mm Flow MK3 this year to hopefully see a difference.
Excuse my ignorance, but were mavic 721s (21mm inner width) not the go to dh rim in years gone by and regularly run with maxxis 2.5 inch tyres? I definitely ran them and thought they were fine and didn't suffer from floppyness
Yep, but you probably ran 40psi and tubes.
Running wide tyres, tubeless, low pressures is what wide rims are for, and why wide tyres make sense. If you run 20psi on a narrow rim with no tyre, there's a real lack of support as the tyre shape is more like a balloon, and the sidewalls can fold and pinch flat the bead. It's even worse with no tube.
Also, were Maxxis 2.5 tyres actuslly 2.5? I seem to remember than being more like 2.3, whereas a 2.8 tyre is closer to 2.8. Which is a huge difference in size.
Do we need a new tyre size category?
Trail Plus?
Seriously though, I reckon it's good the boundaries are being pushed, and it'll all reign in to sensible sizes. We'll all run 2.5" tyres in the dry (when someone makes a proper sized 2.5 tyre), and 2.3 tyres in the wet.
They'll fit in most bikes, so no new components needed and most new rims will be bigger than 23mm these days on trail bikes anyway.
Long live Trail Plus!
Run what you've got OP and ignore all this "you must have this rim you must have that rim".
I run OO CM's on my Sentinel rims and they feel great. I'd have absolutely no quarms running 2.5 or wider on them either.
I've also read of others running Dirt Wizards on Stans Flow rims with no problems.