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I've just got a set of Ambrosio wheels (both sides fixed instead of standard fixed/free flip-flop) and will be putting on my new sprockets.
I am also intending to switch my current 42t chainring for a 48t. One gear I want to run is 48x18 (approx 72") - currently running 42x16.
As a bit of a mechanical berk, can somebody tell me how much extra chain am I likely to need for this and/or will it be best to just go & buy a new 1/8" chain too?
Thanks in advance.
http://www.machinehead-software.co.uk/bike/chain_length/chainlengthcalc.html suggests only a couple more which seems weird.
I'd go for a new chain.......you don't want 2 connections on one chain. SNAP!
48x18 is 72" exactly (gear inches are quoted in terms of a 27" nominal wheel and not your actual tyre size. Using your tyre size is like guessing the length of a table and giving an answer to 3 significant figures). 48x18 is a great gear. I ran it for about a year and a half until I changed today. There's no real reason to get a new chain unless you have no links. If you need extra links then I'd say get a new chain.
Monkeytrousers:I'd go for a new chain.......you don't want 2 connections on one chain. SNAP!
What do you mean? 2 connections in a chain? My chain has been broken at about 15 different links. do you mean masterlinks? If so, you don't need to put in another. Just lengthen the chain with a chain tool.
The single speed chains I've used are KMC, ones got the standard spring link like a BMX and the other is a bit like a Sachs powerlink. I don't fancy just joining a chain using a chain tool..........unless you haver a brand new pin like the Shimano HG ones(chain specific).......you push thro with chain tool then break off extra portion. Do link pins exist for use with a chain tool?............Remember I'm a mountain biker, we use different chains.
Monkeytrousers:The single speed chains I've used are KMC, ones got the standard spring link like a BMX and the other is a bit like a Sachs powerlink. I don't fancy just joining a chain using a chain tool..........unless you haver a brand new pin like the Shimano HG ones(chain specific).......you push thro with chain tool then break off extra portion. Do link pins exist for use with a chain tool?............Remember I'm a mountain biker, we use different chains.
Traditional solid pinned track/single-speed chains are fine for joining with a chain tool repeatedly. They're not mushroomed much at all so breaking and re-joining doesn't make bad shit happen.
Will make a note of that for my forthcoming Mercian build. Cos there's every chance I'll make a James Hunt of the gearing and have to change the chain length.
Even 48x16 is fine in Glasgow. Just gotta take your time on the hills.
euan:Even 48x16 is fine in Glasgow. Just gotta take your time on the hills.
Don't know. That gear is a favourite of some but It's a bit steep for most.
euan:Even 48x16 is fine in Glasgow. Just gotta take your time on the hills.
That's what I'm on, and yeah, I only have a problem when i leave Glasgow city centre.
but seeing as I'm doing that more often, I'm going to change down.
You did fine on the way out to Eaglesham though like.
im running 44-15 and its perfect :)
euan:You did fine on the way out to Eaglesham though like.
Found it pretty tough, in all honesty. Way back was amazing, though.
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