Chainrings spacing
- Thread starter Jimmy2021
- Start date
Neco is budget but generally OK. A M770 or possibly an earlier generation like a square taper version of M750 complete chainset would be a good choice. Photo below for indication only.
Sadly, our bike industry in terms of equipment get's locked into periods with some fore-aft time wise, but it's not infinite especially as we approach more modern with planned retirement it get squeezed. A more modern crank and BB would also fit but you will struggle if you want a triple.
Another option if you are on British shores is sack it all off and get some RS7 Middleburns.
Sadly, our bike industry in terms of equipment get's locked into periods with some fore-aft time wise, but it's not infinite especially as we approach more modern with planned retirement it get squeezed. A more modern crank and BB would also fit but you will struggle if you want a triple.
Another option if you are on British shores is sack it all off and get some RS7 Middleburns.
Uncle Grumpy
Devout Dirtbag
For Shimano cranks with a clamp on front derailleur, the spacers are:
68mm BB shell - 1 x 2.5mm spacer on the non drive side, 2 x 2.5mm spacers on the drive side
73mm BB shell - No spacer on the non-drive side, 1 x 2.5mm spacer on the drive side.
Shimano Mountain BBs are a little longer in the threaded insert than their road counterparts to allow for the spacers.
Looks like you've tried with various combinations to no avail. Almost like the crank has been made with a road bike crank axle length as opposed to the longer MTB axle.
Sorry to hear it hasn't worked out.
If your heart is set on external BB triples - I have had good luck with Race Face Deus cranks, using Shimano BBs (Race Face ones don't have the longevity in my experience).
Just a note, if you go with a Truvativ crank, they take a different BB to Shimano/Race Face/FSA cranks. Truvativ ones have a narrow crank axle on one side.
Life was simpler when it was square taper or square taper!
Grumps
68mm BB shell - 1 x 2.5mm spacer on the non drive side, 2 x 2.5mm spacers on the drive side
73mm BB shell - No spacer on the non-drive side, 1 x 2.5mm spacer on the drive side.
Shimano Mountain BBs are a little longer in the threaded insert than their road counterparts to allow for the spacers.
Looks like you've tried with various combinations to no avail. Almost like the crank has been made with a road bike crank axle length as opposed to the longer MTB axle.
Sorry to hear it hasn't worked out.
If your heart is set on external BB triples - I have had good luck with Race Face Deus cranks, using Shimano BBs (Race Face ones don't have the longevity in my experience).
Just a note, if you go with a Truvativ crank, they take a different BB to Shimano/Race Face/FSA cranks. Truvativ ones have a narrow crank axle on one side.
Life was simpler when it was square taper or square taper!
Grumps
