Mountain bike
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Fat tires on mountain bikes?



i saw a bike the other day on the trails & it had these really fat tires do you need special rims for these tires? how do they ride? i mostly use this bike for mountain biking & very little for street as i use it to go to work 2 blocks away,

Wider tires have more volume and thus can be run with less pressure, giving you a more comfortable ride and more grip over rough terrain.
A wider rim will make your tire body bigger = more volume, but that is only recommended with tires from 2.2in. If you run narrow tires on a wide rim, chances of your tire coming off the rim while riding are up, which you don't want to happen

So if you are only cycling to work, I recommend standard width rim with 2.0 - 2.2 in tires. run those at a pressure of 1.8 to 2.4 bar, depending on how much you weigh.
it sounds like they are only used for grip on rough terraine!!
it depends how fat you want to go , I ride on my trail bike 26X2.4 tires and on my full on DH bike 26X3.0..a wider rim is a help for mounting your tire and a wider rim helps against less flats.
but the wider tires aren't something you'd want to ride to work, wide tires are heavy and your daily trip to work will wear down your treads faster the just trail use
you don't need a wider rim to run wider tires but it is a help
you can run wide tires up to a point and then youll need to change rims i can run mine up to about 2.35 and then it gets really tough to get the tire on. id go as fat as u can go.
There's a bike from Surly that's called Pugsley, it has like 4.0" (or nearly that) wide tires. They use a different rim, rigid fork and the frame is special for that. I don't think you can adapt any bike for that.
big tires have great grip, but you don't necessarily need them
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