I'm after a 39T single speed crankset to go with my Nexus Inter8 hub the LBS is building up for me. They offered the Shimano recommended crankset (@$170) which includes outboard bearings. I'm somewhat of a luddite (I've only just installed a cartridge bottom bracket to trial) and apart from the excessive cost I just don't like the sound of this newfangled outboard bearing nonsense.
Can anyone advise me of some plain-Jane square taper 170mm single speed cranks preferably with a 39T chainring? Doesn't have to be online, but online is ok, a brand name that I can give to the LBS would do (though they are very much like the Soup Nazi (http:// en.wikipedia.org/wiki/Soup_Nazi) in there so I'm almost afraid to ask).
I'm after a 39T single speed crankset to go with my Nexus Inter8 hub the LBS is building up for me. They offered the Shimano recommended crankset (@$170) which includes outboard bearings. I'm somewhat of a luddite (I've only just installed a cartridge bottom bracket to trial) and apart from the excessive cost I just don't like the sound of this newfangled outboard bearing nonsense.
Can anyone advise me of some plain-Jane square taper 170mm single speed cranks preferably with a 39T chainring? Doesn't have to be online, but online is ok, a brand name that I can give to the LBS would do (though they are very much like the Soup Nazi (http:// en.wikipedia.org/wiki/Soup_Nazi) in there so I'm almost afraid to ask).
Any old road cranks with replacable chainrings can be converted to SS easily. These are easy to find (your local bicycle recycle place will certainly have some). All you'll need then is a set of short chainring bolts and an appropriate chain ring.
Cheers
Joel
-- Human Powered Cycles | High quality servicing and repairs [email hidden] | Affordable second hand bikes (03) 9029 6504 | Bicycle reuse centre www.humanpowered.com.au | Mechanical and on-road training and instruction
Can anyone advise me of some plain-Jane square taper 170mm single speed cranks preferably with a 39T chainring?
I'll have a look in my "crank box" on the weekend...
BTH
Ta. I just realised I've got some worn out Shimano Biopace cranks that could be pressed into service except the biopace rings are elliptical (only the middle ring is worn out) so probably not good for hub gears. I tried to get a replacement chainring from the LBS when it wore out but they baffled me with BCD figures and generally didn't want to help (I still consider this preferable to the thinly veiled hostility they normally exhibit).
Ta. I just realised I've got some worn out Shimano Biopace cranks that could be pressed into service except the biopace rings are elliptical (only the middle ring is worn out) so probably not good for hub gears. I tried to get a replacement chainring from the LBS when it wore out but they baffled me with BCD figures and generally didn't want to help (I still consider this preferable to the thinly veiled hostility they normally exhibit).
Then you should be able to buy a round 39T chainwheel to fit your cranks.
It'll be worth making sure you've got a bottom bracket of the right length to get "perfect" chainline (no sideways deflection, front to rear). In this respect, you'll be setting the chainline up as if it were a single speed. See http://www.sheldonbrown.com/chainline.html
On 2007-10-29, [email hidden] (aka Bruce) was almost, but not quite, entirely unlike tea:
Quoted message said:
BT Humble said:
lemmiwinks said:
Can anyone advise me of some plain-Jane square taper 170mm single speed cranks preferably with a 39T chainring?
I'll have a look in my "crank box" on the weekend...
Ta. I just realised I've got some worn out Shimano Biopace cranks that could be pressed into service except the biopace rings are elliptical (only the middle ring is worn out) so probably not good for hub gears.
Why not? The chainline stays under the same tension.
-- TimC Can't open /usr/share/games/fortunes/fortunes. Lid stuck on cookie jar.
you'll need something at least vaguely built for the job.
Preferably running a tougher chain. IE track or BMX chain. That means perferably a thicker toothed chainring. Anything less will struggle and possibly wear and/or snap
The Alfine chainset that the LBS is recommending is rather good and a steal at that price IMHO.
Ta. I just realised I've got some worn out Shimano Biopace cranks that could be pressed into service except the biopace rings are elliptical (only the middle ring is worn out) so probably not good for hub gears. I tried to get a replacement chainring from the LBS when it wore out but they baffled me with BCD figures and generally didn't want to help (I still consider this preferable to the thinly veiled hostility they normally exhibit).
Then you should be able to buy a round 39T chainwheel to fit your cranks.
I did some googling and turned up Sheldon's article on measuring BCD but I haven't had a chance to check my chainrings as yet.
Quoted message said:
It'll be worth making sure you've got a bottom bracket of the right length to get "perfect" chainline (no sideways deflection, front to rear). In this respect, you'll be setting the chainline up as if it were a single speed. Seehttp://www.sheldonbrown.com/chainline.html
John
I'm slightly concerned about chainline as I just installed a cartridge BB to try and it's 122mm. It's a roadbike but I'm currently running a MTB triple. I figure if I need a shorter spindle length I'll buy a new cartridge BB and put the 122mm in my MTB which is in pretty dire need of either a rebuild of the cup and cone BB or a replacement.
On 2007-10-29, [email hidden] (aka Bruce) was almost, but not quite, entirely unlike tea:
Quoted message said:
BT Humble said:
lemmiwinks wrote: > Can anyone advise me of some plain-Jane square taper 170mm single > speed cranks preferably with a 39T chainring?
Quoted message said:
Quoted message said:
I'll have a look in my "crank box" on the weekend...
Quoted message said:
Ta. I just realised I've got some worn out Shimano Biopace cranks that could be pressed into service except the biopace rings are elliptical (only the middle ring is worn out) so probably not good for hub gears.
Why not? The chainline stays under the same tension.
Does it? Ok, I'd assumed it wouldn't, but I'd not put much thought or examination of the chainrings into that assumption.
The LBS told me that Biopace chainrings were no longer available when I tried to get a new one about 18 months ago. However I'd just be happy with a chainring that fits, biopace or not.
Any old road cranks with replacable chainrings can be converted to SS easily. These are easy to find (your local bicycle recycle place will certainly have some). All you'll need then is a set of short chainring bolts and an appropriate chain ring.
The only bicycle recycle place is the shop at the tip (I got a nice lugged steel roadie for $15) but it's probably worth checking out.
The LBS told me that Biopace chainrings were no longer available when I tried to get a new one about 18 months ago. However I'd just be happy with a chainring that fits, biopace or not.
There's a lot of noise about "Q Rings" and "Rotor cranks" in the 'bent world, both of which apparently do the same thing as biopace.
The LBS told me that Biopace chainrings were no longer available when I tried to get a new one about 18 months ago. However I'd just be happy with a chainring that fits, biopace or not.
There's a lot of noise about "Q Rings" and "Rotor cranks" in the 'bent world, both of which apparently do the same thing as biopace.
Zebee
I can imagine how well enquiries about anything remotely 'bent related would be received at my LBS!
On 2007-10-29, [email hidden] (aka Bruce) was almost, but not quite, entirely unlike tea:
Quoted message said:
Zebee Johnstone said:
In aus.bicycle on Mon, 29 Oct 2007 22:37:42 -0000
Quoted message said:
The LBS told me that Biopace chainrings were no longer available when I tried to get a new one about 18 months ago. However I'd just be happy with a chainring that fits, biopace or not.
There's a lot of noise about "Q Rings" and "Rotor cranks" in the 'bent world, both of which apparently do the same thing as biopace.
I can imagine how well enquiries about anything remotely 'bent related would be received at my LBS!
"And when you're done choosing that, come over to our stand here where we have a lovely display of beards"?
-- TimC I don't want Perl to be beautiful -- I want you to write beautiful programs in Perl. --Larry Wall
On Oct 30, 8:57 am, flyingdutch <flyingdutch.2z8...@no-
mx.forums.cyclingforums.com said:
you'll need something at least vaguely built for the job.
Preferably running a tougher chain. IE track or BMX chain. That means perferably a thicker toothed chainring. Anything less will struggle and possibly wear and/or snap
Once I measure my BCD I can see what the LBS has in stock. I'm breaking with tradition and not buying a Huffy chain from Kmart, so the LBS will provide chain.
Quoted message said:
The Alfine chainset that the LBS is recommending is rather good and a steal at that price IMHO.
Now *that* is a surprise! I don't want to change my BB though.
