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Old 11-21-07, 08:49 AM   #1
roccobike
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Suntour same as Sun Race????

Here's my opportunity. I have a set of Suntour 7 speed, downtube index shifters, but no matching freewheel and I've read that Suntour 7 sp. is not the identical spacing as Shimano.
A couple months ago, my bike flipping buddy hands me a bunch of left over parts including three MTB rear wheels. I finally got around to looking at them, and one of them has a "Sun Race", 7 speed freewheel. However, instead of stating it was manufactured by Maeda Industries, it says "Roots". It requires a double prong removal tool just like Suntour. Did I get lucky and come across a seven speed Suntour compatible freewheel or is this just another Shimano compatible freewheel. If it is Suntour equivalent, I will mount it on my Fuji Team and redish the rim. But I don't want to go through that effort if it's not the same.
Any help is greatly appreciated.
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Old 11-21-07, 09:35 AM   #2
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For what its worth Sun Tour 7 speeds will index on Sachs freewheels. Roger
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Old 11-21-07, 09:41 AM   #3
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I don't believe Sun Race is what's left of SunTour. Pretty sure they're different companies, but have no idea about the compatibility.
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Old 11-21-07, 09:46 AM   #4
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Two different companies. Sun Race components are usually cheap stuff from Taiwan.

Most of their 7-speed FW's are Shimano-index compatible though - check to see if the freewheel is new enough to have ramping on it. If it does, you should be home free.

Take care,

-Kurt
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Old 11-21-07, 12:14 PM   #5
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Thanks for all the good input. Kurt, you're right, it's attached to a really low end rim so it's certainly not high end stuff.
USAZorro, Unfortunately, I think you're right, but I had to ask.
rhenning, I did not know that, but I do now. Hello, Ebay!
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Old 11-21-07, 12:21 PM   #6
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Quote:
Originally Posted by roccobike View Post
Here's my opportunity. I have a set of Suntour 7 speed, downtube index shifters, but no matching freewheel and I've read that Suntour 7 sp. is not the identical spacing as Shimano.
A couple months ago, my bike flipping buddy hands me a bunch of left over parts including three MTB rear wheels. I finally got around to looking at them, and one of them has a "Sun Race", 7 speed freewheel. However, instead of stating it was manufactured by Maeda Industries, it says "Roots". It requires a double prong removal tool just like Suntour. Did I get lucky and come across a seven speed Suntour compatible freewheel or is this just another Shimano compatible freewheel. If it is Suntour equivalent, I will mount it on my Fuji Team and redish the rim. But I don't want to go through that effort if it's not the same.
Any help is greatly appreciated.
Suntour (standard, not 'Ultra') 6 speed cog spacing and Shimano 6 speed cog spacing are the same.

So a Suntour 6 speed shifter AND Suntour (Accushift) rear derailleur will index a Shimano 6 speed freewheel just fine. And vice versa.

Suntour 7 speed center to center cog spacing is 5.3mm, 5.3mm, 4.8mm, 4.88mm, 4.8mm, 4.8mm.

Shimano 7 speed center to center cog spacing is 5.0mm across all intervals.

Suntour 7 speed shifters with Suntour Accushift rear derailleurs will NOT cleanly and reliably index a Shimano 7 speed freewheel or cassette. Repeat: cleanly and reliably And vice versa.

Suntour Accushift six and seven speed freewheels ALL require 4 prong removal tool. All day long.

Here is a good Suntour Accushift catalog reference
http://www.wooljersey.com/gallery/v/...slideshow.html

I run Suntour 7 speed accushift shifters and a suntour accushift rear derailleur with a custom spaced Hyperglide cassette built from a Shimano XT 8 speed cassette. Its center to center spacing is 5.3mm, 5.3mm, 4.8mm, 4.8mm, 4.8mm, 4.8mm. It indexes perfectly. And with the Hyperglide ramped cogs, I get the best of both worlds.
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Old 11-21-07, 01:56 PM   #7
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Originally Posted by cudak888 View Post
Two different companies. Sun Race components are usually cheap stuff from Taiwan.
Inexpensive rather than cheap; it gives good value for the money.
I never saw a Sun Race freewheel with a two-prong hub though.
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Old 11-22-07, 06:09 AM   #8
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...and one more case that could prove useful to the OP:

Sheldon Brown reports that Suntour 6 speed shifters (not the Suntour alpha 3000 shifters, its assumed) mated with a Shimano SIS rear derailleur will index a Shimano SIS 7 speed freewheel or cassette.
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