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JJ XTR singlespeed homebrew mod

24K views 45 replies 30 participants last post by  GFisher2001  
#1 ·
A little do it myself project. Let me know what you think...
 

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#3 ·
Good job

You probably saved a ton of money and a lot of time via DIY compared to having Jeff Jones do it for you, but one must admit Jeff does a fine job... just fine, as evidenced by the photos below. (Photos stolen out of Whafe's amazing " It's not just about the Bike, but the journey to the bike also....." thread on the 29er board.)

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Anyway nice work yourself.

--Sparty
 
#4 ·
Sparticus said:
You probably saved a ton of money and a lot of time via DIY compared to having Jeff Jones do it for you, but one must admit Jeff does a fine job... just fine, as evidenced by the photos below. (Photos stolen out of Whafe's amazing " It's not just about the Bike, but the journey to the bike also....." thread on the 29er board.)

Image

Image

Image


Anyway nice work yourself.

--Sparty
Nice polished shine on the real ones. Should I even try to round out the edges with the dremel, or is that to much to ask of the fiber wheel?
 
#6 ·
DC_MTB said:
Nice polished shine on the real ones. Should I even try to round out the edges with the dremel, or is that to much to ask of the fiber wheel?
rough in the rounded edges with a flat bastard file and then go to a fine cut file to finish it off. Just make sure you have minimal vibration in your vise system (vise, table/stand whatever) take your time and you'll be fine.
 
#11 ·
Panzerknacker said:
sorry to be a stick in the mud, but should we be concernd about the heat from the cutting wheel tempering the spider so it will be significantly weaker and fail?
IMO, grinding will not be hot enough and the process is not gonna be long enough for tempering. this procedure requires hard work, not science. IMO, no offence.:)
 
#18 ·
My version of the same:

Crank:
Image


Complete Bike (have a Boone ring on order now for about 7 month we'll see if they ever produce it).

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Image


I used steel wool and sand paper to take of the finish (I read about the oven cleaner trick but did not want to go through that). A buffing wheel and some time seemed to clean up the part nicely (also I did not remove the rubber O rings, do not think oven cleaner would be nice to these if you went that direction a remove/re-install would be required).

First ride everything is awesome.
 
#19 ·
i've been wondering for a while... and now that i've seen so many people do it, i have to ask.

why!?

why not just get yourselves a nice SS crank?

i'm rather new... lemme think though. can you use a larger array of crank gears this way? easier to swap them out? just to have something uber custom?
 
#21 ·
I am looking to do the same in the future for my 2x9 set up. My I am also including a plan to expand the bolt pattern from the 102 to 104 so I can use standard rings. Was going to do it soon until I found a Truvativ Carbon Stylo GXP set for $100 without the bottom bracket that I did not need.

G
 
#22 ·
Mallanaga said:
i've been wondering for a while... and now that i've seen so many people do it, i have to ask.

why!?

why not just get yourselves a nice SS crank?

i'm rather new... lemme think though. can you use a larger array of crank gears this way? easier to swap them out? just to have something uber custom?
I had the XTR crank sitting around collecting dust. I figured I might as well make a project out of it.
 
#23 ·
gstahl said:
My version of the same:

Crank:
Image


Complete Bike (have a Boone ring on order now for about 7 month we'll see if they ever produce it).

I used steel wool and sand paper to take of the finish (I read about the oven cleaner trick but did not want to go through that). A buffing wheel and some time seemed to clean up the part nicely (also I did not remove the rubber O rings, do not think oven cleaner would be nice to these if you went that direction a remove/re-install would be required).

First ride everything is awesome.
Wow. Nice job. Looks alot better then mine. Did you use a Dremel?
 
#24 ·
DC_MTB said:
Wow. Nice job. Looks alot better then mine. Did you use a Dremel?
Dremel, file and sand paper. I follow the curve of the bolt "buckets" (so to speak so it was reasonably easy to get the ends to look nice. Other the only thing I did was use a caliper to get the depths (or heights) at the end of the arms equal. I polished with metal polish and a hand drill (with a buffing wheel of course).
 
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