Wheels and tyres

I tried fitting a set of 35mm cx tyres the other evening and they popped off the rim. Bit disappointing but can't be helped. But having done some more trail riding with my wife I think some wider tyres for both of us would be beneficial.
So - what's the widest tyre sensible for a hybrid and a tricross? Would 40mm be too much?
And then - what width rim would I need to put them on - the current wheels seem to be about 19mm outside and 14ish inside the lip of the rim - measured with a tape measure so not exact!
So - what's the widest tyre sensible for a hybrid and a tricross? Would 40mm be too much?
And then - what width rim would I need to put them on - the current wheels seem to be about 19mm outside and 14ish inside the lip of the rim - measured with a tape measure so not exact!
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http://sheldonbrown.com/tire-sizing.html
The other wheels I have are the CXP22 ...
I'm quite happy to spend a little bit to get my wife some reasonable wheels for her hybrid as it's the only set of wheels she has for that bike and it's a few years old now so could probably do with some upgrades!
Yeah, get her some nice Archertype, you stingy bum...
13 internal width is a bit too narrow. I found I could fit pretty chunky tyres on Open PRO, which are 15 or so, but ultimately with a 17 internal you get the best of all worlds, as you can range from 23 to pretty much anytihng you want. More than 17-18 and you lose the ability to fit 23 mm tyres, so that's where the happy medium is.
I'm not worried about fitting 23mm tyres - we've got road bikes for that ... so I just need to find some suitable wheelsets ... or get some built!
A re-rim job with a wider one would work out relaitevly cheap, but often the spokes and hubs are so censored that it's depressing to even start working... anyway, Mavic A 719 is the rim for the job... but they cost 85 quid for the pair
I'd want new hubs anyway - the stock ones on the CXP22 are shocking! At least I know why the tyre popped off - and should've been ok on the other rims .. oh well - pity as I have a spare CXP22 rim so could've used them ... But I can have a look for the new rim/wheels now .