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Discussion Starter · #1 ·
Bench grinders are fun :)

Awhile back I posted a thread soliciting advice on how to mount a Jumpstop type inner chainguide on my Leviathan (original thread here). Got alot of good advice, but none of the products were quite what I was thinking ... either they were too heavy, too expensive, wouldn't fit or were no longer being made. I continue to be surprised that there is no simple design inner chainguide device like a Jumpstop designed to mount up on a frame without a the traditional seattube mount area. So (with inspiration from Shiggy and Bigwheel's homemade contraptions) I decided to have at it with my bench grinder, an old Acera E-type FD bracket and whatever else I could find in the garage.

Ended up with what appears to be a good working solution. Wish I had taken a pic of the e-type bracket before I went to work on it, because I took a whole bunch of material off of it to end up with a good fit. The "arm" that is doing the chainstopping duty is some piece of metal that I think was part of a window blind kit. I've ridden it once with this setup over some root-infested washboard trails and so far/so good.

Some other random stuff ...
  • Got a new Shimano 7701 chain to replace a SRAM. Much quieter, no wind up noise and it was NOT packed in all of that thick glue/sludge that I've always seen them packed in before. Nice. SRAM quick release connector works fine with it so far (only 1 ride though).
  • Finally got Lock-on grips (ouries). How come they can't design soft endcaps for these things?
  • Just switched back to my 9 year old cloth-covered saddle (kind of like Kevlar) after trying out a smooth leather seat for the first time. Missed it I did, the lack of traction on the smooth leather really didn't work out for me.
  • I rode a wheelie for 1/2 mile on the Lev over a dirt road today. (hopefully someone here will appreciate that, because my wife just said "that's nice honey").
Anyways, some pics ...
 

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A 1/2 mile! That's way more than I could do. BTW, my wife laughed when I read her that. She wasn't all that impressed either. ;)

Nice handy work on the chain guide too.

Cheers!
-Ian
 

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Good work! I see a 1x9 in my futre as well. None of the current offerings fit the Leviathan?

Bummer. FIRE UP THE GRINDER?
 

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Recovering couch patato
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Can you do a couple more of those? (Not just the wheelies, also the guides)
I messed up a couple races this season because my 1x9 started acting up after it have been perfect in training, and later I couldn't get the guide I wanted.

Very impressive, both of them. I guess I don't really understnd the wheelie, my best can't have been more than 150 yeards. Need to learn to take corners during the wheelie.
 

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Nice work

but as long as you mentioned weight there seems to be a lot of metal left there on a relatively unstressed part.

I see some drilling and Dremeling in your future...
 

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paintbucket
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Looks good. But I sometimes wonder at the weight of the jumpstop + the bash guard/outer ring vs a front derailleur with the lower limit screw cranked way in. And how much of the derailleur could be cut away.
 

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Discussion Starter · #9 ·
bigdrunk said:
None of the current offerings fit the Leviathan?
Check out that first thread from a couple months ago, lots of good advice suggestions, but none of them that are available are simple and cheap.

Cloxxki said:
Can you do a couple more of those? ... Need to learn to take corners during the wheelie.
I was lucky to get that e-type bracket for $2 bucks from the LBS (it was actually the whole derailleur for that price, a very ancient FD that isn't made anymore), and that piece of metal from the window blinds, I only had one. Besides that, I don't really know if its bulletproof yet, no long term testing has been done. As for turning during a wheelie, its MUCH harder on a 29er.

wooglin said:
Looks good. But I sometimes wonder at the weight of the jumpstop + the bash guard/outer ring vs a front derailleur with the lower limit screw cranked way in. And how much of the derailleur could be cut away.
Good point, but would a FD keep the chain from dropping to the outside? I'm not sure. As for weight, the thing I made weighs about 65 grams and I think the Spot Brand chainguide weighs about 80 grams (=145 grams total). The SRAM XGen FD that those replaced weighs about 180 grams. So the weight is a little better, and add to that the fact that I didn't want to mess with the FD, because I'll probably end up using it again in the future.
 

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Have you seen the guy in Tampa that calls himself Catwalk? I have ridden with him at Flatwoods and he would ride a wheelie all the way through the trails without putting the front down. He aslo used to live in Brandon and ride to work off of Waters ave. in Tampa on one wheel.
 
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