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In my personal experience the order is roughly the following Chains and cassettes Cables Rear derailleur pulleys Chainrings Derailleurs don't really wear out but can be accidentally broken. And as …

Positron doesn't have return spring but instead uses single wire for pushing and pulling. That means you have to replace the cable and shift lever, too. The photo shows that the bike has claw mount d …

The bolt circle diameter for recent road triples is 74 mm, which allows something around 23 teeth. Looking at the catalog of Specialites TA, their smallest chainring is 24 teeth. In addition to tripl …

If you know the exact model and year of your levers, you should be able to find both original and third party replacement parts online. …

Any square taper bottom bracket with BSA threads (1.37inch by 24tpi), 68mm shell width, JIS taper and axle length roughly 123mm will work. Changing axle length from 122.5mm to 123mm makes 0.25mm dif …

I had to try the combination when the BMX freewheel on my singlespeed bike failed, and I could find only 3/32" replacement. …

The spare part code is 5-FD-RE116 for double or FD-AT016 for triple and it's available from several online shops. LBSes specializing in road bikes should have it too. Check out the spare parts catalo …

The jockey wheels are fairly standard, with few different tooth counts and small differences in thickness. If you are in doubt about the exact thickness, there are aftermarket pulleys that come with s …

Yes. The cassette teeth are clearly worn, and the large chainring teeth have worn into characteristic shark fin shape. If you use new chain with these, it will skip. The small chainring looks still go …

The Ergopower shifters have a part called G spring that eventually wears out. The symptoms are inaccurate shifting and less sharp clicks, just as you are experiencing. The part is still available, not …

There are third party replacement pulleys from manufacturers like BBB, Tacx, etc that come with a set of adapter bushings to fit different derailleurs. …

Just searching for "bottom bracket replacement" should find enough instructions. BB-MT800 is completely different type and requires different crankset to work. …

First, you have to decide whether you want to replace the rim (the ring shaped outer part) or entire wheel. If the wheel is otherwise in good shape, swapping the rim is an easy task and a shop should …

If you are planning to ride the bike, replace the handlebar stem