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11

For the same reason you can't have a fixie with a chain tensioner. The load on the chain when slowing a fixie is too great and in the wrong direction for a derailler or tensioner to hold. The cage will be pulled forward and your chain will skip make a nasty noise and most likely come off or break something expensive.


5

No, it is not a good idea. You'd be spending more than the bike is worth even for a basic internal gear hub (even assuming you got the wheel rebuilt for free using the existing rim and spokes, if possible), let alone buying a rear wheel with an IGH built in. You do need a chain tensioning pulley or horizontal dropouts, which while can be built more robustly ...


3

Its likely disassembles in one of two ways: two cone wrenches (one on each side of the hub) to remove the jam nuts. This is the likely option. From your photo it looks like there is a flat spot on the jam nut. two hex wrenches (one on each side of the hub) that fit into the axle end. Two videos demonstrating these techniques: http://aol.it/15nYDub ...


3

In general, yes. They use the same thread/attachment to the hub and they are almost the same width. If you have friction shifting it will work fine, but if you have indexed shifting that will obviously not work - the spacing between cogs is different. There's more information here


2

I found a bunch of forum posts from people with similar problems. Shimano freewheels made prior to about 1985 have smaller diameters, about 20mm instead of 22-23mm that they have today. A search for "Shimano freewheel remover 20mm" brings up some useful results. It looks like Bicycle Research Tools makes a remover called the CT-4 which is designed for older ...


2

If your rims are bending under normal loads there are a couple of things you should check and maintain: Tire Pressure: Running at the higher range of pressure for your tires will help you avoid bending the rims when you hit holes or other obstacles. Wider Tires: If your brake clearance supports it, you can run slightly wider tires. This will give you a ...


2

sounds like your chainrings are worn. Look at the rings and see if they are "shark fin" shaped rather than symmetrical - a google image search for "worn out chainring" will show examples including some really, really worn out rings. The old worn out chain likely wore out the rings as well. I've had exactly what you're describing on a couple bikes and it ...


2

Since this was mentioned in a comment, freewheels are not the same as freehubs+cassettes (see http://sheldonbrown.com/free-k7.html) for details. The rest of the discussion should hold if freewheel is replaced with cassette+freehub though with minor modifications - I don't know if this bike has a freewheel or a cassette+freehub since I can't load the product ...


1

This Shimano tech doc has the relevant part numbers for you. Y3CZ98040, I think. You may want just part of it though. It also has a handy interchangeability table, that tells me a freehub body from an M985 or M775 would work too, but might be the wrong colour. You can look up more here.


1

If your hub is in good condition & you wish to keep it having the wheel rebuilt is the way to go. However if your shop is trying to charge you more then 100$ish dollars for a rebuild, especially on an older hub perhaps consider doing the rebuild yourself. Re/building wheels is not a particularly difficult task with a wheel stand & proper tools all of ...


1

Shimano R085, 8/9 speed, 36H $100 QBike.com 2595 N. Federal Highway , Fort Lauderdale, FL 33305 800-390-2122 http://store.qbike.com/shimano-hub-rear-fh-r085-36-cl-8-9s-black-bulk.html this is the only thing i've been able to find. been searching since new years 2013.


1

Fantastic ! Building a fixed gear conversion is a lot of fun. tommy_o gives a great list of all the parts that go on a conversion, but when I try to imagine what it's like to have an old bike that you want to hack on, I think it's helpful to imagine what you'll have to change about your bike, so I'll give that a shot. As long as the existing bike is in ...


1

The cog and/or freewheel will not come with the hub unless it explicitly states it (it is not typical to come with it, as rear cogs come in different tooth count and width) To make this easier, these are all the parts required for a fixed gear bicycle with a threaded headset: Frame Fork Headset Stem Handlebars Bar Tape or Grips, Depending Brake Levers ...


1

You do not indicate if this is the SX ("tadpole model" weighing 48 lbs) or the USX HD (weighing 65 lbs.) (Either curb weight is a challenge but if you've been spinning away at 80 or better rpm, I say "reward yourself with a lighter trike." Review the archives at http://www.rtrmag.com - Recumbent and Tandem Rider Magazine or The Recumbent Journal for ...



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