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Wheels Mfg. Single Speed Conversion Kit

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3.4 out of 5 (17 ratings)
17 customer reviews



> Hubs & Parts > Mountain Hubs > Hub Parts

  • Aluminum spacers to converts a Shimano splined cassette hub to a single speed
  • Also available with cog and chain-sandwiching guide plates for added chain security
  • Campagnolo system is gray
Shipping Offers - $2.99 Pick-a-Product Shipping, and Free Shipping on orders over $150

7 spacers and 16t x 3/32 cog and guide (Shimano)

Item #:12037-26364 
Mfg#:SSK-3 
UPC:836572004609 
EAN:836572004609 
Other #s:
FW4598 
WZ1955 
CASS8154 
Available to ship DETAILS
Oregon2 - Apr 21st73 - Apr 23rd
Minnesota24 - Apr 21st 
New Mexico1 - Apr 21st 
Utah23 - Apr 21st 

pickup_biking_man Available for pickup DETAILS
Portland, OR2 Apr 20th73 - Apr 23rd
Ogden, UT0 - Apr 21st23 - Apr 22nd
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26 - Apr 23rd
50 - Apr 24th
73 - Apr 25th

$30.00

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7 spacers and 16t x 3/32 cog (Shimano)

Item #:12037-26366 
Mfg#:SSK-2 
UPC:836572004593 
EAN:836572004593 
Other #s:
FW4599 
WZ1953 
CASS8152 
Available to ship DETAILS
Oregon1 - Apr 21st94 - Apr 23rd
Minnesota11 - Apr 21st 
New Mexico7 - Apr 21st 
Utah50 - Apr 21st 

pickup_biking_man Available for pickup DETAILS
Portland, OR1 Apr 20th94 - Apr 23rd
Ogden, UT0 - Apr 21st50 - Apr 22nd
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58 - Apr 23rd
69 - Apr 24th
94 - Apr 25th

$25.00

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7ea 4.5mm and 2ea 1mm spacers (no cog) (Shimano)

Item #:12037-26367 
Mfg#:SSK-1 
UPC:836572001981 
Other #s:
WZ1951 
59052150 
CASS8150 
Available to ship DETAILS
Oregon3 - Apr 21st32 - Apr 23rd
Minnesota1 - Apr 21st 
New Mexico11 - Apr 21st 
Utah1 - Apr 21st 

pickup_biking_man Available for pickup DETAILS
Portland, OR3 Apr 20th32 - Apr 23rd
Ogden, UT1 - Apr 21st31 - Apr 23rd
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32 - Apr 24th

$17.00

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No Cog (Campagnolo)

Item #:12037-57595 
Mfg#:SSK-CA 
UPC:836572006504 
EAN:836572006504 
Other #s:
FW4601 
Available to ship DETAILS
Oregon0 - Apr 21st0 - Apr 23rd
Minnesota0 - Apr 21st 
New Mexico0 - Apr 21st 
Utah0 - Apr 21st 

pickup_biking_man Available for pickup DETAILS
Portland, OR0 Apr 20th0 - Apr 23rd
Ogden, UT0 - Apr 21st0 - Apr 25th

$27.00

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3.4 out of 5 (17 ratings)

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Customer Reviews

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Wheels MFG Gear Spacers

Cheap spacers that are made well and fit to the hub shell perfectly. Comes with enough sizes to fine tune chain line.

Pros: Varied sizes allow for perfect chain line.

Cons: More colors would be cool.

Would Buy Again: Yes
Would Recommend: Yes

Reviewed on: October 24, 2013
Reviewed by: Justin D.

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I think the price is high for what you get, I bet this is a high profit margin item. It did make it super easy though to build up a one speed. The lockring is too small to really tighten over the outer spacer- I was not happy with that aspect of this kit. I modified it slightly to my satisfaction.
Would I buy this product again?- maybe.

Pros: It makes it easy and I only had to scrounge my spare parts a little.

Cons: I didn't like the way the lock ring fit on the spacers at all. I took a cog off an old cassette and used it between the last spacer and the lockring. Had I not done that I might have returned the kit. It's on a single speed- that cog is gonna be getting reefed on! I think they need a slight redesign on the spacer/lockring interface. The way I have it set up it works great.

Reviewed on: September 24, 2013
Reviewed by: lee h.

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Not the best...

These do not fit tightly on the freewheel cassette and therefore will work loose with time. I would suggest looking elsewhere for a SS conversion kit.

Cons: Loose fit, cannot tighten properly.

Would Buy Again: No
Would Recommend: No

Reviewed on: February 27, 2013
Reviewed by: TC

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Does the job.

It works well. You can fine tune your chainline. Great way to convert a geared hub to single-speed.

Pros: Cheap.

Cons: Not fancy.

Would Buy Again: Yes
Would Recommend: Yes

Reviewed on: January 02, 2013
Reviewed by: Spencer K.

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A spacer is a spacer

I bought the kit without the cog. This also meant that I didn't get the lockring. You need a 12t lockring to fit these spacers. The picture shows what appears to be 2- 3mm and 6- 1mm spacers. I think mine came with 6- 2mm and 2- .5mm spacers. I have had some issues getting my cog to be centered while getting the correct amount of spacers to fit the lockring. The spacers are also a bit larger than my freehub which means it takes some massaging to line up perfectly.

Pros: Durable

Cons: Needs more in between sized spacers to get best adjustments.

Would Buy Again: No
Would Recommend: No

Reviewed on: February 06, 2012
Reviewed by: Chris S.

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Wheels Mfg Single Speed conversion kit

This product was meant for the conversion from geared hub to single speed. This is the first brand I have tried, but I feel they left out a part. While I am pleased with the actual quality of the product, I don't feel the value was great because I still need to buy an additional part to make this work. I assumed because it was a conversion kit, it would have everything I'd need. However, I still need to buy the cassette lock ring to hold everything on the wheel's hub. A little disappointed that didn't have everything I needed, but I think that was my fault. I need to do better research next time.

Cons: Needs one additional part to make it work so it isn't the complete kit. Make sure to order a lock ring with it if you buy it.

Would Buy Again: Yes
Would Recommend: Yes

Reviewed on: September 19, 2011
Reviewed by: LAURA M.

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I picked up the spacers-only kit for Shimano freehubs, and it works fine. The finish isn't as nice and the chainline is a bit less adjustable than with the Fibonacci kit, but it's less than half the cost and probably flexible enough to get the chainline within a millimeter of perfect for most applications.

Would Buy Again: Yes
Would Recommend: Yes

Reviewed on: August 05, 2011
Reviewed by: Matt

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A good value

Spacers come in a good variety of sizes. I have used them on shimano hubs and had no issue getting a perfect chain line.

Would Buy Again: Yes
Would Recommend: Yes

Reviewed on: March 10, 2011
Reviewed by: Richard B.

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Fool-proof conversion kit

Pros: Maximum adjustability

Cons: None

Would Buy Again: Yes
Would Recommend: Yes

Reviewed on: March 06, 2011
Reviewed by: Joe K.

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Good amount of spacers

Easy to setup your chainline perfectly.

Pros: Ease

Cons: $$$$

Would Buy Again: Yes
Would Recommend: Yes

Reviewed on: February 03, 2011
Reviewed by: Colin M.

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The Shimano Kit (Minus Cog) i was not impressed with. It came with NO lockring, and was missing one spacer.

Loose tolerances,and poor fitting spacers that walk out and around when tightened.

It worked, but was not pretty. maybe I expected too much.

Pros: Inexpensive

Cons: Spacers fit loose
No lockring


Would Buy Again: No
Would Recommend: No

Reviewed on: January 09, 2011
Reviewed by: Charles G.

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Great ss set up idea

It allowes me to get the perfect chainline. Just matter of arranging the spacers.

Pros: Perfect chainline!

Cons: None.

Would Buy Again: Yes
Would Recommend: Yes

Reviewed on: October 20, 2010
Reviewed by: Mtn biker

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The cog that came with my Shimano kit did not look like the picture. In fact, it was just a thin piece of metal that I wouldn't ever trust on my bike. That said, I bought it knowing I wouldn't use the cog.

The spacers do the job on my Shimano freehub.

Pros: good spacers and lockring

Cons: cog is worthless

Would Buy Again: Yes
Would Recommend: Yes

Reviewed on: October 19, 2010
Reviewed by: paul a.

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This is a mixed bag with this SS conversion kit. On the positive, I like the different thickness of the many spacers. Easy to line up the cog with your chainline, On the not so positive, there was a looseness in the way the adapters feel on the freehub, and I did not like the thin cog. Having said that, this did work, and for the money it is less expensive than other setups or Surly stainless cogs, but in my opinion, I would look at other conversion kits

Pros: lots of adjustment with the spacers

Would Buy Again: No
Would Recommend: No

Reviewed on: October 18, 2010
Reviewed by: Terry T.

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I bought the spacers only kit for Shimano compatible hubs. I bought this kit because it has thin 1mm spacers for fine chainline adjustment (that some other kits don't include at all) and it has a lot of them. The plethora of thin spacers have also come in handy for setting up "dinglespeeds" and custom cassettes

Would Buy Again: Yes
Would Recommend: Yes

Reviewed on: September 16, 2010
Reviewed by: Nate

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This is a flawed design. Using a ramped cog off the campy cassette will only result in you dropping your chain while pedaling resulting in a crash.

I was lucky this happened to me with no traffic other wise I could likely have been hit by a car.

Cons: Suggests the use of a ramped cog which is dangerous

Would Buy Again: No
Would Recommend: No

Reviewed on: September 13, 2010
Reviewed by: Keith H.

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This relates to the Shimano, no cog spacers offering.

Pros: Good price.

Cons: The 1mm spacers' outer diameter is larger than the 4.5mm spacers' outer. The inner is the same for both 1mm and 4.5mm, of course. If I had know this before buying, I would have looked elsewhere.

Would Buy Again: No
Would Recommend: No

Reviewed on: September 05, 2010
Reviewed by: D. S.

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