I've recently purchased a KTM Macina Action 29 (and, as is my custom, I'll write a review article in due course, for interest and edification - broadly it gets a thumbs up!). I took it for some light off-road recently and acquired slow punctures in both wheels, probably caused by thorns; I suspect one of my routes was a bit optimistic as to what the wheels could take!
So I popped to a bike shop to grab a self-sealing Bontrager inner tube, and have fitted it despite finding that the spec isn't an exact match. The wheels are marked as 29x2.25, and the inner tube is 29x1.75-2.125. Placed flat atop each other, the old and new tubes seemed to be an exact width match, but I guess 0.1" was always going to be a small difference. It seems to be holding circa 30psi fine, but it's not had any use yet.
Am I taking any safety risks by fitting this? I'm presently minded to make this bike my off-road bike, so it won't see as much commuting use as my other e-bike (where safety is more critical, in my view).
So I popped to a bike shop to grab a self-sealing Bontrager inner tube, and have fitted it despite finding that the spec isn't an exact match. The wheels are marked as 29x2.25, and the inner tube is 29x1.75-2.125. Placed flat atop each other, the old and new tubes seemed to be an exact width match, but I guess 0.1" was always going to be a small difference. It seems to be holding circa 30psi fine, but it's not had any use yet.
Am I taking any safety risks by fitting this? I'm presently minded to make this bike my off-road bike, so it won't see as much commuting use as my other e-bike (where safety is more critical, in my view).