Hi all. Help needed please. I own a Specialized Sectuer road bike which has a Shimano 175 fc 2303 crankset on. I recently fitted a pair of Shimano pedals and seem to have cross threaded the right hand crank, it can now be pushed through the thread with ease. I have looked on the internet for a new crank - without much luck. Can I still purchase a right hand crank without buying the whole crankset? Do any other cranks fit? Many thanks in advance.
Advice needed on Crankset
- Thread starter Ninjanut
- Start date
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Cycleops
Legendary Member
- Location
- Accra, Ghana
This one? https://www.sjscycles.co.uk/cranks/right-hand-crank-spider-shimano-fc2303-170-mm-silver/
Out of stock but they are available. I know it’s 170 but you probably won’t notice, if you do should be easy to pick up a matching left.
Any square taper crankset will fit if you need to replace the whole thing.
Welcome to the forum.
Out of stock but they are available. I know it’s 170 but you probably won’t notice, if you do should be easy to pick up a matching left.
Any square taper crankset will fit if you need to replace the whole thing.
Welcome to the forum.
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rogerzilla
Legendary Member
To add...almost any 175 arm is ok BUT the square hole must match in two respects:
1. If the other crank hole is a square, thus must be a square. If it's a diamond, this must be a diamond. Otherwise your cranks will end up at 135 degrees like the idiot mechanic in that Royal Navy TV ad!
2. You need JIS taper, not ISO.
1. If the other crank hole is a square, thus must be a square. If it's a diamond, this must be a diamond. Otherwise your cranks will end up at 135 degrees like the idiot mechanic in that Royal Navy TV ad!
2. You need JIS taper, not ISO.
rogerzilla
Legendary Member
Actually, re-reading that, if it's the RH crank you might as well buy a new crankset. It won't be much more expensive, if at all. Get the same bolt pattern if they are sold without rings.
fossyant
Ride It Like You Stole It!
- Location
- South Manchester
Do not mix crank lengths on the bike, ie 175 one side and 170 on the other side - you might not notice, but you'll cause all sorts of aches and pains, spine, pelvis, knees, hips. Fine having different length cranks of different bikes, but not the same bike.
Look about as you can get a 'new old school' chainsets quite cheap - sometimes cheaper than a chain ring - hell of a waste, but hey.
Look about as you can get a 'new old school' chainsets quite cheap - sometimes cheaper than a chain ring - hell of a waste, but hey.
fossyant
Ride It Like You Stole It!
- Location
- South Manchester
Any square taper will fit, but note, you may need a new BB as the axel length may be too short or two long for the chainset for a good chain line (I've had to do this in the past - updated an old Deore LX chainset to a new Deore LX one, had to get a new BB that was about 10mm shorter.
Cycleops
Legendary Member
- Location
- Accra, Ghana
He could even upgrade to a Hollowtech if he’s replacing the whole shaboodle. They come with a BB which is direct replacement for the ST. It’ll save a fair bit of weight.
Ajax Bay
Guru
- Location
- East Devon
Check the length of the bottom bracket spindle (spec suggests 113mm). Then look for a square taper crankset with the same BCDs for the rings (5 bolt and 130mm/74mm). Transfer your chainrings onto the new (to you) crankset. Provided you have a crank puller and some allen keys this is all 'easy' to do.
Here the tech sheet: https://si.shimano.com/pdfs/si/SI-1LN0B-002-ENG.pdf
Like this RHS crank perhaps - but you check: https://www.ebay.co.uk/itm/Shimano-...Left-or-Right-Crank-175mm-Black/164180144250? (doesn't matter if described as 9sp).
Or you could make it easy (and still economic) by going to Spa Cycles and buying this chainset (110/74 but includes all 3 rings anyway): https://www.spacycles.co.uk/m2b0s109p2000/SPA-CYCLES-XD-2-Touring-Triple-Chainset
(NB recommended bottom bracket 110mm) your 113mm BB will be fine.
Whatever, then screw the pedals in with care
turning the top of the pedal axle towards the front of the bike iyswim.
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As well as the usual campag, shimano, sram, stronglight options, have a look at Sinz, particularly if you want to venture into shorter cranks.
https://www.crucialbmxshop.com/sinz-expert-square-taper-bmx-race-cranks.html
I have these on two of my bikes, with crank lengths 145 & 150. They are well made and look good on the bike.
Edit Spelling Corrected
https://www.crucialbmxshop.com/sinz-expert-square-taper-bmx-race-cranks.html
I have these on two of my bikes, with crank lengths 145 & 150. They are well made and look good on the bike.
Edit Spelling Corrected
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rogerzilla
Legendary Member
Campax is useful if you're going through a difficult period on the bike.
(I'll get my coat)
(I'll get my coat)
Check the length of the bottom bracket spindle (spec suggests 113mm). Then look for a square taper crankset with the same BCDs for the rings (5 bolt and 130mm/74mm). Transfer your chainrings onto the new (to you) crankset. Provided you have a crank puller and some allen keys this is all 'easy' to do.
Here the tech sheet: https://si.shimano.com/pdfs/si/SI-1LN0B-002-ENG.pdf
Like this RHS crank perhaps - but you check: https://www.ebay.co.uk/itm/Shimano-...Left-or-Right-Crank-175mm-Black/164180144250? (doesn't matter if described as 9sp).
Or you could make it easy (and still economic) by going to Spa Cycles and buying this chainset (110/74 but includes all 3 rings anyway): https://www.spacycles.co.uk/m2b0s109p2000/SPA-CYCLES-XD-2-Touring-Triple-Chainset
(NB recommended bottom bracket 110mm) your 113mm BB will be fine.
Whatever, then screw the pedals in with care
Most helpful thank you. I did notice the Sora cranks on ebay but was put off when they state 9sp as my bike is only 7sp. I cannot work out out what the difference is. Will they fit ok?
Ajax Bay
Guru
- Location
- East Devon
The FC-2303 is part of an 8 speed groupset so '8 speed' whatever you have on the rear. 6/7/8 speed chains are the same width.
You are not changing the chainrings or the chain; you're just using a Sora crank (part of a 9sp groupset) to bolt the 8sp chainrings onto. It will be fine and your rings will bolt on fine, imo. I suspect that the Sora crank is exactly the same as the new Claris FC2403 but with different graphics.
The easier more assured option is the Spa Cycles chainset at £35 - your call.
You are not changing the chainrings or the chain; you're just using a Sora crank (part of a 9sp groupset) to bolt the 8sp chainrings onto. It will be fine and your rings will bolt on fine, imo. I suspect that the Sora crank is exactly the same as the new Claris FC2403 but with different graphics.
The easier more assured option is the Spa Cycles chainset at £35 - your call.
