Technical & Reference Section > Tech and Restoration
Cranks and Chainrings
HEYWOOD BMX:
:) Most oldschool spiders/chainrings have a 23.8mm centrehole-to fit a Tufneck onto Profiles you`ll prob need this size down to 19mm tophat washer:)
The VW Doc:
Sorry to hi-jack a little, bit I am looking for a spec for the nuts & bolts to hold the chainring to the spider (as I am wanting to replace them with stainless steel ones) and not having any to go on is making it a little difficult
Can anyone assist please?
MartyC:
--- Quote from: The VW Doc on May 05, 2011, 08:45 PM ---Sorry to hi-jack a little, bit I am looking for a spec for the nuts & bolts to hold the chainring to the spider (as I am wanting to replace them with stainless steel ones) and not having any to go on is making it a little difficult
Can anyone assist please?
--- End quote ---
You need single chainring or outer chainring bolts like these:
Usually 6mm thread depth :daumenhoch:
The VW Doc:
Cheers Marty - Why are they externally threaded but still hollow? Weight ,or does soemthing screw into them?
I haven't got the spider yet, so I am waiting to see how that fits, but the chainring is not threaded
(Sorry for the Newbie questions)
MartyC:
--- Quote from: The VW Doc on May 06, 2011, 03:32 PM ---Cheers Marty - Why are they externally threaded but still hollow? Weight ,or does soemthing screw into them?
I haven't got the spider yet, so I am waiting to see how that fits, but the chainring is not threaded
(Sorry for the Newbie questions)
--- End quote ---
No worries, they will have another section to screw into like these ones...
They are generally hollow to save weight ;)
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