i have an '07 ovolve and im gettin a new rear wheel for it and i was thinking of oging single speed, i mostly use my 3rd and 4th gear which are 17 and 19t and i was thinking of getting a 18t cog, but also would it be cheaper to buy a normal hub and get a cog and some spacers and use that? or would it be better to get one of those cogs with the freewheel mechanism built into the cog? (i thinhk its a microdriver or something) and get a hub thats made for the microdrive thing? also, are those ones with the freewheel mechanism built into it as strong as a normal rear hub? (like stripping the mechanism inside)?
http://www.echobike.com/index1.htm - its at the very top of the page. thats what i mean when i say microdriver (im jsut assuming thats what it is)
Not quite sure i understand u but a cog with a freewheel mechanism built in is simply called a freewheel. A cassette hub would be better to get. either sigle speed or a normal one with a with a single speed conversion set. Freewheels are weaker because they are threaded on to the hub and therefore push the bearings further towards the center of the axle with leads to bent axles because there will more leverage on the axle when u land on your rear wheel. I'm not exactly sure cause this is in trials but bmx single speed hubs are strong and work great but chances are they will not fit in your dropouts because the are made for BMX but i'm not sure. A good bmx hub(i'm getting one) is the WETHEPEOPLE q-lite or maybe the primo mix.
You've got a few options. If you're into freewheels, there are freewheels designed for trials that engage really fast. You can either put them on a freewheel crank ( a specially designed crank that has threads) with a fixed rear hub or you can get a fixed threaded rear hub and put the freewheel on the back instead. Most trials riders would put the freewheel on the cranks though.
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You could also get a freehub(that's probably what you have now). That way you wouldn't have to get freewheel cranks. Just get a singlespeed cog and spacers...something like a Hope Pro II trials or maybe a chris king?
You can make any casette hub into a single speed by using the cog you want(18t)and replacing the rest with spacers that you can get from old casettes(your lbs might have some they would be willing to give away)
Theres no need in going with a Chris King or Hope hub, or even a freewheel setup if your riding an Evolve, your drivetrain will end up costing you more than the entire bike did.
Its a beginer bike and any mountain bike wheel would do till you have enough money and have progressed enough to upgrade to a nicer bike.
Just get the best wheel you can thats in your price range.
the only thing stock on my evolve are the bars and the rims, and the last thing im buying is a frame to swap al lthe parts to, which probably wont be till next year