Advice please - suitable crankset

[John Tarpey]

Hello everyone. I have a Raleigh Maxim cromo 4130 (3 x 7) that I'm trying to restore. The group set is Altus ct-91. The derailleurs and shifters are fine as is the casette but the crankset needs replacing,(FC ct-91).
I have removed the bottom bracket which has cb-90 on it. It is 118 mm length, 68mm casing. Is there a crankset on the market that is compatible as I am struggling to find one.
Hope someone can help.

Thanks, John

 

[brocklanders023]

Any square taper 7 speed crankset should fit mate. If you're after second hand put a wanted ad on here and you'll be offered plenty of options.

 

[retrobikeguy]

these have stupid small chainrings and BB mounted front derailleur if I remember right .......... so =

https://www.ebay.co.uk/itm/255442059124?hash=item3b79887f74:g:2AYAAOSwfzliWE82

 

[Takingabreak]

Hello everyone. I have a Raleigh Maxim cromo 4130 (3 x 7) that I'm trying to restore. The group set is Altus ct-91. The derailleurs and shifters are fine as is the casette but the crankset needs replacing,(FC ct-91).
I have removed the bottom bracket which has cb-90 on it. It is 118 mm length, 68mm casing. Is there a crankset on the market that is compatible as I am struggling to find one.
Hope someone can help.

Thanks, John

what's wrong with the crankset?

 

[John Tarpey]

Hi. Thanks everyone for your replies. A few of the teeth are damaged and generally worn. I will put pics up later. In work until 6pm. I had read that as well as needing to fit the axel length, a new crankset needs to be compatible with the shifters and derailleurs. Am I over complicating things?

 

[John Tarpey]

Hi Retrobikeguy. I have just ordere the crankset off eBay that you suggested. Cheers, John.

 

[John Tarpey]

these have stupid small chainrings and BB mounted front derailleur if I remember right .......... so =

https://www.ebay.co.uk/itm/255442059124?hash=item3b79887f74:g:2AYAAOSwfzliWE82

Hello rbg. Have just ordered the crankset you suggested. Cheers, John

 

[Woz]

Don't want to scare, but check the codes stamped on the cranks against this:
https://bike.shimano.com/en-US/info...lls-and-repairs/fc-ct90-m920-mc12-cranks.html

 

[John Tarpey]

Don't want to scare, but check the codes stamped on the cranks against this:
https://bike.shimano.com/en-US/info...lls-and-repairs/fc-ct90-m920-mc12-cranks.html

Phew. Just contacted the seller. Fc-ct91. My shins will be safe. Thanks Woz.

 

[John Tarpey]

what's wrong with the crankset?

Not sure if I've already replied to you. Thought I had but it's not showing. It's quite worn all over but some teeth are almost completely missing or bent.