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This biggest difference is the top (Kona) is a Dual Crown fork where as the bottom image has a Single Crown fork. Dual crowns are generally found on downhill mountain bikes. The style has been copied down to department store bikes as well, but don't let the look fool you those forks are still only as good as what you paid for them. For a while, there were ...


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There are seatpost shims available for a few dollars. You should get them easily in your local shop or online. I use an aluminum shim in one of my bikes with exactly the dimensions you need, it works flawlessly and looks very clean. I got it for about 3.50 € (5$).


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If you plan on doing slopestyle/dirt jumping, you'll want at least front suspension in the range of 80-120mm (80-100mm being preferred) and no rear suspension. With larger slopestyle type jumps you may want a full suspension bike, but it's not worth it when you are just learning. On the other hand, if you are looking at doing more street BMX and park style ...


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Fork travel is limited by frame. You should look for something about 80mm. You could put 140mm fork, but bike geometry will be uncomfortable. XCM basically is just a sprint. Same speed for "down" and "up". If there is local bike club, go to them and ask to try some bike with good fork. Feeling can't be explained :) Gravel feels like tarmac :P XCM is pretty ...


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I don't think (like the other answers) a suspension fork will do it. There's another reason as well - suspension forks only isolate vibrations in one linear dimension, as you go over bumps, as well as up and down you will accelerate and decelerate, and pitch up and down. So here are some other thoughts. We might be able to offer more help if you give some ...


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It's fairly easy to compute (or at least estimate) the surface area of the piston and divide that into the weight of the object suspended to obtain the pressure needed to keep it "levitated". Let's assume a piston with a diameter of 2" (5.1cm) -- that's (conveniently) 3.14 square inches. Divide that into 3 KG or 6.6 pounds (ignoring the weight of the ...


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I think using a suspension fork won't work - 3 kg is way lower than the usual loads a suspension fork is designed to isolate shocks at any meaningful level (the mass on the fork would be at least an order of magnitude below the usual on a bike, so it would be hard to have enough deflection to do something useful at 3 kg without bottoming out all the time on ...



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