Take the 2-minute tour ×  The bike is about 15 years old. The
size of tyre is probably 28.  I want to change the old chain. I
am not sure which chain I can put to the bike.  Does any chain
which length is enough for 28 fit my bike?  share|improve this
question Post more information: picture ideal, description of
gears better. Does it have derailleur? In that case 3/32. If it
is not using derailleur then 1/4 inch. To get the length right,
compare to existing chain. –  ʍǝɥʇɐɯ Jun 12 '11 at 15:12 Chain
length isn't particularly vital -- most chains will come with
extra length and you use a chain tool to shorten it to the
correct length. This is why so many wrenchers have key-chain
fobs made of bits of leftover chain. –  Neil Fein Jun 12 '11 at
16:45 @Mathew, I suggest putting that as an answer, as I tried
to come up with an answer that says much more and failed. Maybe
say "BMX/singlespeed chain" as well as 1/8" (I assume 1/4 was a
typo :) –  Мסž Jun 15 '11 at 1:27 First one needs to know if
this is a derailleur