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'Narrow' 10t jockey wheels on 90s Deore LX derailleur

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'Narrow' 10t jockey wheels on 90s Deore LX derailleur

Old 09-08-20, 01:55 AM
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Roundis
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'Narrow' 10t jockey wheels on 90s Deore LX derailleur

I have a Shimano Deore LX (SIS 8) derailleur with a 7 speed wheel. Recently a jockey wheel came off and I wasn't able to retrieve its washers or inner metal cylinder (they're in the long grass somewhere). Both the jockey wheels are stamped NARROW. I measured the thicknesses of the wheels without washers or inner barrel and the CENTRE ON G wheel is 6.3mm and the other is 6.8mm as opposed to some new Shimano spares I have which are 9.1mm wide. I can't find any 'narrow' jockey wheels online. Will wider ones do the job or will I run into problems?

Last edited by Roundis; 09-08-20 at 05:27 AM.
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Old 09-08-20, 02:46 AM
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Originally Posted by Roundis View Post
I have a Shimano Deore LX (SIS 8) derailleur with a 7 speed wheel. Recently a jockey wheel came off and I wasn't able to retrieve its washers or inner metal cylinder (they're in the long grass somewhere). Both the jockey wheels are stamped NARROW. I measured the thicknesses of the wheels without washers or inner barrel and the CENTRE ON G wheel is 6.3mm and the other is 6.8mm as opposed to some new Shimano spares I have which are 9.1mm wide. I can't find any online 'narrow' jockey wheels online. Will wider ones do the job or will I run into problems?
Only issue I can think of is the bolts may be too short. You'll also likely need to adjust the gears to reflect the different centreline of the new jockey wheels. Rather than Shimano, why not get some Tacx ones with cartridge bearings, they come with a bunch of adapters and then you know the bolts will be OK.
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Old 09-08-20, 03:17 AM
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Yes, the bolts I have are too short. I'll look into Tacx, thanks. I wouldn't be bothered about using a different brand. Also, will I get away with using one with more teeth, eg 11 rather than 10?

Last edited by Roundis; 09-08-20 at 03:24 AM.
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Old 09-09-20, 09:03 PM
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If it is the lower pulley...

https://www.ebay.com/itm/Shimano-Der...gAAOSwEOhfVRiR

If it is the upper Centeron pulley, it won't work.

John
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Old 09-11-20, 05:55 AM
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You mean changing the number of teeth won't work or using the wider jockey wheels won't work?

I have bought some longer bolts so I was planning to try the wider jockey wheels this weekend, I'll report back.

Thanks for the ebay link, that looks to be exactly what I have. I'm in the UK though, I haven't found any jockey wheels with the NARROW stamp on them available over here so far.

Last edited by Roundis; 09-11-20 at 07:04 AM.
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Old 09-16-20, 01:14 AM
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I got hold of the longer bolts so I was able to fit the wider jockey wheels. After giving the gear cables a quick adjustment, everything works perfectly as far as I can tell.
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Old 09-16-20, 11:18 PM
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Good job!

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