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so? didja stop? or are you too busy riding to post pics? think im gonna get one too if i can find one. but it would still be great to see how yours is building up.


Tonight's progress, with crappy garage lighting.

<a href="https://www.flickr.com/photos/[email protected]/6222061748/" title="On-One Pompetamine Build by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6160/6222061748_df39cf01dd.jpg" width="500" height="333" alt="On-One Pompetamine Build"></a>

I also put the Tektro levers on the handlebar to play around with positioning to see how they'd feel. I think I've got 'em close.
 

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Discussion Starter · #22 ·
Still workin on it. Been waiting on the wheels and due to some delays I wont be able to get the build done till tuesday at the earliest
 

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Discussion Starter · #23 ·
got the wheelset the other day, which allowed me to make some progress in the past couple days. photos on hold because I'm waiting on some centerlock rotors. FYI, the Origin8 centerlock to 6 bolt rotor adapters DO NOT FIT the Pompetamine fork at all. On-One "recommends" centerlock rotors due to clearance issues, but IMO they should really say "don't even think about trying 6bolt rotors because some configurations just flat won't work".

my bar tape wrap job isn't the prettiest (it's been a few years since I wrapped tape, so the ends could be better), but so far the bike has come together pretty well. next time I install bar tape, I don't think I'll use red tape on red ano bars because the two reds are oddly different. my wife even commented on the "pink" handlebars earlier and expressed serious doubt about my assertions that they were indeed red.

the bike does not like sand in my brakeless spins around the house this afternoon. could prove to be interesting if I take it on any of the local "dirt" roads (which are really mostly just sand), which is why I built it with 38mm tires. The Specialized Crossroads tires I got are big for their size, like some of their other tires I've tried on my mtb. I should have expected it and ordered a size down. fitting fenders with these might be tough. good thing I'm in TX in the middle of a drought right now. Fenders are not absolutely necessary right now.
 

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got the wheelset the other day, which allowed me to make some progress in the past couple days. photos on hold because I'm waiting on some centerlock rotors. FYI, the Origin8 centerlock to 6 bolt rotor adapters DO NOT FIT the Pompetamine fork at all. On-One "recommends" centerlock rotors due to clearance issues, but IMO they should really say "don't even think about trying 6bolt rotors because some configurations just flat won't work".

my bar tape wrap job isn't the prettiest (it's been a few years since I wrapped tape, so the ends could be better), but so far the bike has come together pretty well. next time I install bar tape, I don't think I'll use red tape on red ano bars because the two reds are oddly different. my wife even commented on the "pink" handlebars earlier and expressed serious doubt about my assertions that they were indeed red.

the bike does not like sand in my brakeless spins around the house this afternoon. could prove to be interesting if I take it on any of the local "dirt" roads (which are really mostly just sand), which is why I built it with 38mm tires. The Specialized Crossroads tires I got are big for their size, like some of their other tires I've tried on my mtb. I should have expected it and ordered a size down. fitting fenders with these might be tough. good thing I'm in TX in the middle of a drought right now. Fenders are not absolutely necessary right now.

i dont have any experience with centerlock rotors and hubs, so i dont know what the difference is from the 6 bolt clearance wise. i dont get it, what doesnt clear?

im actually much more interested in what doesnt work on this frame than what does, so i would know what pitfalls to avoid in building it up. your comments about the fork and tires are helpful. if its not too much trouble, could you put up pics of the issues you run into, like the rotor clearance?

im still curious about the rear brake tabs. i noticed you put the rear bb7 on. did you need to use extra washers after all? do you think you could post a pic of the tabs?

actually, do you own a horizontal dropout inbred? if you do, are its brake tabs identical with the pompetamine? cause i do, and if they are the same, then i would know what to expect.

on-one says over a month wait on the frame. shoulda grabbed one before they ran out.
 

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Discussion Starter · #25 ·
I can take a few pics and post 'em up.

I used washers on the inner surface of the disc tabs (faced portion), but not on the outer surface. Didn't need to.

To post pics of the rotor clearance issue, I'd have to bolt up the adapters to the rotors and put all that back on. Meh, not worth it. The clearance problem is caused by the bolt heads hitting on the lower fork leg. I can post a close-up of that area sans rotors so you can see the issue. I actually had a hard time finding the problem (the wheel would not rotate) because it was so cluttered down there when I mounted it up. Centerlock wheels don't have the chunky mount in that area, which is why clearance is not an issue. Part of the problem MIGHT be with the specific adapters I used (Origin-8) as they have a shim that sandwiches the rotor against the adapter so the lockring has something to grab onto. Different adapters (like maybe the DT Swiss ones, which are so much more that it's better to just get new rotors).

This is my only On-One. My MTB is a Specialized Stumpjumper FSR.

I MIGHT be able to fit the fenders on, but I'll have to slide the rear wheel farther back in the track ends. I'd probably need to add another link to the chain to do it. Maybe a half link would work. But it would not allow for as much adjustment in the chain as it wears. Tire width is fine, but tire height is what causes the issue.
 

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Discussion Starter · #26 ·
fork clearance

<a href="https://www.flickr.com/photos/[email protected]/6267902967/" title="IMG_4668 by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6095/6267902967_df1f6e96b5.jpg" width="333" height="500" alt="IMG_4668"></a>

You can see that the fork leg just barely clears the Centerlock splines here. The Origin-8 adapter doesn't come out flush with the end, but when you put the rotor on, you have to install a spacer that sits outside the edge of the hub shell. The bolts for the rotor have to fasten all 3 parts together because the lockring grabs onto the spacer to hold everything in place. The lockring has space, but the bolt heads hit the fork leg.

With the wheel in this position:

<a href="https://www.flickr.com/photos/[email protected]/6267903739/" title="IMG_4674 by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6034/6267903739_67581d30b7.jpg" width="500" height="333" alt="IMG_4674"></a>

I get this spacing for the 38mm Specialized Crossroads tire.

<a href="https://www.flickr.com/photos/[email protected]/6268428252/" title="IMG_4673 by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6234/6268428252_b9f79601bd.jpg" width="500" height="333" alt="IMG_4673"></a>

As you can see, there's plenty of width, but the tire is rather tall. And there's not a whole lot of space to move the wheel back in the track ends, either. I probably have enough space to fit fenders in there, but doing so would cut down on the amount of adjustment left to account for chain wear.
 

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fork clearance

<a href="https://www.flickr.com/photos/[email protected]/6267902967/" title="IMG_4668 by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6095/6267902967_df1f6e96b5.jpg" width="333" height="500" alt="IMG_4668"></a>

You can see that the fork leg just barely clears the Centerlock splines here. The Origin-8 adapter doesn't come out flush with the end, but when you put the rotor on, you have to install a spacer that sits outside the edge of the hub shell. The bolts for the rotor have to fasten all 3 parts together because the lockring grabs onto the spacer to hold everything in place. The lockring has space, but the bolt heads hit the fork leg.

With the wheel in this position:

<a href="https://www.flickr.com/photos/[email protected]/6267903739/" title="IMG_4674 by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6034/6267903739_67581d30b7.jpg" width="500" height="333" alt="IMG_4674"></a>

I get this spacing for the 38mm Specialized Crossroads tire.

<a href="https://www.flickr.com/photos/[email protected]/6268428252/" title="IMG_4673 by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6234/6268428252_b9f79601bd.jpg" width="500" height="333" alt="IMG_4673"></a>

As you can see, there's plenty of width, but the tire is rather tall. And there's not a whole lot of space to move the wheel back in the track ends, either. I probably have enough space to fit fenders in there, but doing so would cut down on the amount of adjustment left to account for chain wear.
Nate, I would bet the Shimano or DT CL to 6-bolt adaptor would work.
I like that type better than the O-8 style in any case.
 

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Discussion Starter · #28 ·
Nate, I would bet the Shimano or DT CL to 6-bolt adaptor would work.
I like that type better than the O-8 style in any case.
The Shimano and DT adapters cost enough that it just makes sense to buy the CL rotors. I got the low-priced Shimano rotors since Avid does not offer a reasonably priced centerlock rotor.
 

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Discussion Starter · #30 ·
no more build pics until I get the rotors (hopefully Monday) and can finish this thing up. If I have to live with the suspense of having it almost complete on my workstand, y'all can live with the suspense of waiting another day or two for finished build pics.

Just to put some more teasers out there, I think the bike's looking pretty slick. no fenders/racks for now. I just want to get it rolling. I'll get that stuff later. It has a little bit of a monstercross flavor to it, I'd say.
 

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Discussion Starter · #31 · (Edited)
rotors arrived at lunch. All installed, set up, and first commute done. Pretty light (haven't put it on a scale to see what just yet), and pretty fast. geared a little tall for now, but not too tall for my commute. Gives me room to get stronger. probably too tall for trails, though.

Also, I had clearance issues with the rear BB7 caliper. I could not get it to line up with the rotor using the 160mm rear adapter. Thankfully, I had a spare front 160mm adapter from a previous BB7 upgrade for a bike that had a post mount on the fork. I put that spare adapter on the rear end and the caliper fit like a charm. I don't see that mentioned anywhere on the Pompetamine frame page.

Looks like I won't be getting fenders for awhile yet. I thought the page for the frame said it'd fit 38mm tires with fenders, but it says 35mm tires with fenders. Since the tires I got are brand new, I'll be riding them for awhile before I get 35mm tires so I can fit fenders.
 

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rotors arrived at lunch. All installed, set up, and first commute done. Pretty light (haven't put it on a scale to see what just yet), and pretty fast. geared a little tall for now, but not too tall for my commute. Gives me room to get stronger. probably too tall for trails, though.

Also, I had clearance issues with the rear BB7 caliper. I could not get it to line up with the rotor using the 160mm rear adapter. Thankfully, I had a spare front 160mm adapter from a previous BB7 upgrade for a bike that had a post mount on the fork. I put that spare adapter on the rear end and the caliper fit like a charm. I don't see that mentioned anywhere on the Pompetamine frame page.

Looks like I won't be getting fenders for awhile yet. I thought the page for the frame said it'd fit 38mm tires with fenders, but it says 35mm tires with fenders. Since the tires I got are brand new, I'll be riding them for awhile before I get 35mm tires so I can fit fenders.
Nate, I would like to see pics of the rear brake setup
 

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Discussion Starter · #33 ·
Nate, I would like to see pics of the rear brake setup
Will do when I get home tonight.

If I had a smaller tire than a 38, I'm sure the 160mm adapter would have fit fine. To fit the tire in, the wheel has to be farther back in the track ends (see earlier pics regarding tire clearance). That necessitated the whole caliper to slide all the way back to the back of the slots in the caliper adjustment holes. With the caliper all the way back like that, I did not have enough space to adjust the CPS bolts to eliminate major rotor drag. By using a "front" adapter, it's able to sit farther forward in those slots, which gives me enough lateral space to adjust out any rotor drag. If I had a smaller tire that allowed me to move the wheel forward in the track ends, I'd have to go back to the rear caliper adapter.
 

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Will do when I get home tonight.

If I had a smaller tire than a 38, I'm sure the 160mm adapter would have fit fine. To fit the tire in, the wheel has to be farther back in the track ends (see earlier pics regarding tire clearance). That necessitated the whole caliper to slide all the way back to the back of the slots in the caliper adjustment holes. With the caliper all the way back like that, I did not have enough space to adjust the CPS bolts to eliminate major rotor drag. By using a "front" adapter, it's able to sit farther forward in those slots, which gives me enough lateral space to adjust out any rotor drag. If I had a smaller tire that allowed me to move the wheel forward in the track ends, I'd have to go back to the rear caliper adapter.
Good info, Nate.
 

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Discussion Starter · #35 ·
Pics

For all of you waiting to see this build, here it is.

<a href="https://www.flickr.com/photos/[email protected]/6278187119/" title="On-One Pompetamine by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6095/6278187119_98d6248e39.jpg" width="500" height="333" alt="On-One Pompetamine"></a>

Light's not so good, but I got home late tonight. Lots of work to do, and ERDAS (computer software) will be the end of me.

Shiggy, here's some pics of that rear caliper.

Here's one angle where you can see how close to the seatstay this thing is. Note that the cable pinch bolt is very close to the stay. You can't even see the rear caliper CPS bolt here because it's so close to the stay and obscured partially by the rotor.

<a href="https://www.flickr.com/photos/[email protected]/6278708764/" title="On-One Pompetamine by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6044/6278708764_b3766b173c.jpg" width="500" height="438" alt="On-One Pompetamine"></a>

Here's the amount of horizontal clearance I have even with the front adapter. You can't even see here that I dremeled a corner off of the caliper by the dropout to give me a little more lateral space for adjusting things.

<a href="https://www.flickr.com/photos/[email protected]/6278188457/" title="On-One Pompetamine by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6104/6278188457_801d876e08.jpg" width="315" height="500" alt="On-One Pompetamine"></a>

Non-drive view of the caliper, showing how I was able to slide it all the way forward and get the right pad alignment on the rotor.

<a href="https://www.flickr.com/photos/[email protected]/6278709960/" title="On-One Pompetamine by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6217/6278709960_1586df72a3.jpg" width="500" height="333" alt="On-One Pompetamine"></a>

Proof that I did indeed wind up using a 160mm front adapter.

<a href="https://www.flickr.com/photos/[email protected]/6278710596/" title="On-One Pompetamine by mtbikernate, on Flickr"><img src="https://farm7.static.flickr.com/6098/6278710596_d31de5f157.jpg" width="500" height="333" alt="On-One Pompetamine"></a>

If building up one of these frames with BB7's (mtn version), make sure you have both a front and rear 160mm adapter on hand depending on the wheel position in the track ends.
 

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That's a solid piece of hot awesome NateHawk.

I have a lot of that same issue on my 09 Inbred with BB7s. As I understand most of this is resolved with a 185mm rotor but that is not in the cards for me at the moment. I have my bolts almost all the way forward for tension and the caliper is about halfway on the slider right now. Also to stop the cable rubbing on the seat stay I put a piece of electrical tape there or you could use a piece of that clear frame protector stuff, YMMV.
 

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Discussion Starter · #37 ·
That's a solid piece of hot awesome NateHawk.

I have a lot of that same issue on my 09 Inbred with BB7s. As I understand most of this is resolved with a 185mm rotor but that is not in the cards for me at the moment. I have my bolts almost all the way forward for tension and the caliper is about halfway on the slider right now. Also to stop the cable rubbing on the seat stay I put a piece of electrical tape there or you could use a piece of that clear frame protector stuff, YMMV.
Ha! I just spent $80 on these centerlock rotors even though I have perfectly good 160mm 6 bolt rotors that had fitment issues. Clearance even with the centerlock rotors is TIGHT on the front. No problems getting the caliper properly adjusted there, though.

I was hoping the rims would be a bit more strongly reflective than they are. with the camera flash, you do see some of the reflective effect of the "Halo" finish on the rims. I only hope that it stands out more with headlights shining on them. I might have to do some testing later.

My taping job leaves a bit to be desired. But to be fair, it's my first handlebar wrap since 05, so I'm a little rusty.
 

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I to be honest do not see much reflection from the rims. I took some tape and make "patches" between spokes and this seems to help side and rear view.


You can kind of see it here on the rear.
 

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woah. all this time i had been thinking my only option with the bb7s were 185mm rotors, like the inbred. i didnt realize the smaller rotors were even possible. good to know i might have options.
 
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