8 votes

Single speed chain tensioner comparison

You should never use a sprung tensioner when you have a choice. They add fragility and complexity. They exist only to allow single cog drivetrains to work with dropouts that don't allow chain tension ...
Nathan Knutson's user avatar
5 votes

Chain type and chain alignment for a fixie single speed

The single front chainring won't care about chain width, because it never sees the outside only the inside of the chain. Same goes for a single rear cog. You do need the two to be aligned as well as ...
Criggie's user avatar
  • 124k
3 votes

Single speed chain tensioner comparison

Brakes If you have a coaster brake, then a trackend is the only safe way to tension the chain. Otherwise your braking efforts are initially wasted in the tension spring, which can be damaged by the ...
Criggie's user avatar
  • 124k
3 votes
Accepted

How to adjust rear axle width?

This appears to be a cup and cone hub. The "red" nut is probably the cone, and the "blue" is the locknut. They are tightened against each other to keep the cone from changing ...
OndrejP_SK's user avatar
3 votes

Chain type and chain alignment for a fixie single speed

Update: finished the bike build with the help of folks here. Had to get a shop's help to get the cranks off to access the bottom bracket. Installed a 68x107mm bracket instead of the original 122.5mm ...
fronk's user avatar
  • 147
2 votes
Accepted

How can I know / check if I can use KMC Z7 for my single speed bike instead of KMC S1

Single-speed chains such as the S1 have a nominal inner width of 1/8" while multiple speeds chains such as the Z7 have a nominal inner width of 3/32". So in theory, the Z7 should not be used,...
olliebulle's user avatar
  • 4,119
2 votes

Dia-Compe Gran Compe shot lever - is there a fix for 31.8mm bars?

31.8 is the stem clamp diameter, this is known as oversized. The number that you are concerned with is usually 25.4 or 22.2. Further complicating this is that levers that mount almost up against the ...
alotalot's user avatar
  • 349
2 votes

Chain type and chain alignment for a fixie single speed

The photo looks like you have plenty of chainring to chainstay clearance to move the chainring inboard. If I'm doing the arithmetic correctly, a 68 x 107 UN55 would bring it in around 7.5 mm. There ...
Andy Hutcheon's user avatar
1 vote

How to adjust rear axle width?

Kids bikes take a beating in their life - it looks like the frame has been bent at some point so the OLD is now wider than the axle. The threaded axle will have nuts on the end, probably flanged. I ...
Criggie's user avatar
  • 124k
1 vote
Accepted

Does chain tensioner (tug nut or spring) is needed, for horizontal dropouts?

Chain tension adjustment in frames with horizontal dropouts can be perfectly well achieved without a tensioner by means of sliding the axle forward or backward. This can be done either without or with ...
Paweł's user avatar
  • 741

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