- Winter hack chainset advice for a non-mechanically minded girl please
I just bought cranks and a BB for a singlespeed I’ve built that were square taper. I just guessed the size, went for the middle size actually and lucked out.
Really though you need to measure the length of the actual BB spindle. This would be easiest with the cranks removed.
Those are 8 speed cranks, and you currently have seven. Better check that’ll work(I’ve no idea)
Personally, I’d get rid of the triple and go 9/10 speed with a single ring up front for simplicity.Posted 4 years agoJunkyardMember
Maybe a single ring up front is simpler.
Well it will be simpler but a 7 speed hub cannot take a 9/10 speed cassette so you will only have 7 gears.
+1 for that crank being pish – I have one of a supermarket bike you can have which will last just as long- probably cost about the same to post mind!
FWIW i used a 9 speed crank with 7 speed gears and chain without issue so that will not be a limiting factor
IMHO Get a crank you want – fit it. if you have issues get a bigger BB as you wont really know what size you want till you try it.Posted 4 years ago
I’m probably going to end up bugging P20 about this tomorrow, but I thought I’d try to get an answer here first cos it’s his birthday and I think he’s getting fed up of my stupid bike-related questions… 😉 😳
I have an ancient (?1992) cheapo rigid steel MTB that I use as a commuter cos I can leave it outside the hospital without it getting nicked. However, the drivetrain has seen better days and there are now very few gears that actually work. So I need to replace lots of things.
It’s currently got a triple chainset (22,32,42), 7 speed cassette and square taper BB.
I have seen this crankset on CRC which fits my budget for this bike perfectly (and gives me a more usable range of gears for my commute). However, I have no idea which bottom bracket size I am looking for. The shell on the frame is 68mm wide, but I don’t know which spindle length will fit my bike/those cranks.
I’m looking at this Shimano BB. Can anyone help me size it correctly, or should I just buy all the sizes and send most of them back? 😉Posted 4 years agogarage-dwellerSubscriber
I have a set of Alivio cranks running on a 110 spindle and 73mm shell width. Mine are I think 2011 or 2012 and quality is quite good. Not light thtough.
The required axle length can vary from crank type to crank type as while the taper of the hole is standard the position of the taper relative to the rings can vary. I had some older shimano cranks that needed 115 and some old xt ones at 107.Posted 4 years ago
It’s very tempting! The beauty of this bike is that I can leave it anywhere and no-one would even think of stealing it. I once left it unchained outside the hospital I was working in for a whole day because I forgot my lock and it survived unscathed.
Plus, it’s the first bike I ever bought (at the age of 10 or 11, with money left to me by my Great-grandmother when she died) so I love it dearly!Posted 4 years ago
Thanks for all the advice folks. I’ve gone for components that match as closely as possible the stuff that’s already on the bike (including the alivio chainset). They’ve already been dispatched, so look forward to Monday’s threads entitled “help! my chainset won’t come off” and “aaargh! I hate front mechs”.Posted 4 years ago
The topic ‘Winter hack chainset advice for a non-mechanically minded girl please’ is closed to new replies.