The inspector has returned, and all she has to say is, "what the heck is this crap"?
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwhtCtsQm84HInSE-TthI0iaP6HEnVSCWa0uoMmuSTit5vdMjcTF21b8bd9OZQriUPJ18DTvh5h4Y00hjFqIz6kvz0KO3Hn58wT9hlMejv9macGcWIPQ3C-AcssaJLglAbH2bgTngUSyxY/s400/Rob+Tomlinson+29er+018.jpg)
Well, I'll explain. Rob sent along this picture of his lugged '92 Paramount and asked if I could build a modern lugged 29'er. Not an easy task considering the extreme angles that suspension corrected 29'ers present. On the upside, Rob's a pretty big guy and that helps make some of the angles less problematic.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiOzgfyo3K9sHUjqdbOo18JgUFfVfPyI2qgfjvpuMxd6bBTiHRq5MILbknUiH68C6sPsTzytPOJarUrlzbLbYlC09-5UwNYx5JuLZdfSt-gXA0EhhQ2rHEZb-XcEIz6uhjPDnRVSEFOy7ge/s400/Tote%2520Pictures%2520001.jpg)
I decided to go with a standard size seat tube, 28.6mm, externally butted at the top, and then a 31.8mm top tube and 35mm down tube. A set of double bend chain stays and Paragon chain stay mount disk dropouts finishes things off.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjD78_vUx41Xsjgf-KcyKgoYfiDl-Xa_f4IEcmcKgeh1c8SYGf1CmD2_Wv04fltLXjbDJKPy8_sc0FXwxKY0GZRksZFmx3HxlfqZ30BdaDrN11IEaXWrGaHnFNlPKH5Fetr9bw6_LvPd3jT/s400/Rob+Tomlinson+29er+001.jpg)
I spent a fair amount of time figuring out where to locate the bends and bumps when I built my 29'er last year, so I knew pretty well where to make my cutoffs and bumps for tire and chain ring clearance. I did have to do some work on the chain stay sockets of the bottom bracket shell. It's a road shell, so the sockets are not angled as much as you need. After some subtle persuasion, they came around.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKHHwGkPVzMdxxU1Q0EKhpjeZSyoddGtVfPIobnwtO4hbNZUfVPILhHcDW9i9ckEDsq_Kaok4o5HMcLh6urQSxl0ygI1-tra6aAJ4CNguFtzrLzn3WVxyZ6K-h7VvMTKi8og6B-zETFPiI/s400/Rob+Tomlinson+29er+004.jpg)
I used some 4130 tubing to make the Bi-Lam lugs. First I mitered the end to match up with my geometry, then I drew my design on the tube and cut it out roughly with a hacksaw. Once I had a manageable sized stub, I tacked it onto the head tube where I could do the final shaping. Below is the head tube with the top and down tube "lugs" attached. I made the down tube lug a little extra long on the bottom to act as a gusset and the forked tangs should distribute the stress outward.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiWKPeljotIrc5DWyZe5xxtzlAAZ-XrhmnkzD48AKTs7slfYWvDIGat57b0UbpdDFMipWgX6zWVXRaztWmDtLfrWZ-mXVX67uS9xevBDgSey9NQ8pRYEbTjLcnxWgv_0xpYQGySXSQ8YonP/s400/Rob+Tomlinson+29er+007.jpg)
The tube set, lugs and chain stays all ready to be brazed.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiL9d2-e5bJYgR-7e8Z5fnwRj78byuCnlK1aJH1DjU2ZqStpjCtW3_BBRJGmDrJbtTWk7KPtitXSAR1Oj35UcSOKnG41fZ-YE747ZVsgv69YBy_1MFl4qpflPnPxIr-JDF_KXCknAr3qfIE/s400/Rob+Tomlinson+29er+013.jpg)
A better shot of the bi-lam head and seat lugs.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9wH1fmBLovBfso58TB6MVax_-Ou2oGmN5MemSAFdmGWZxnrHwiivcETrt3Dmi6Z5p9jLvjzh9cSPbsc-pXZQEE4Sqq6_TLfhwE1U74_KJMzSEqp8rKrPX6u1IkkoW9vWq6afjX3CafGno/s400/Rob+Tomlinson+29er+014.jpg)
Once it's finished the Inspector has to have a look! The cable guides are brazed onto the head lugs, reminiscent of Rob's Paramount.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgza6Ro-t7wCGZPKVNitF8OV0a7PCq8ue93j5tzl1acHptHIp1_JTCOGxOrA5mrg4HJzsxXiApXs38omQqomdlJwDq5K_ggFrriQe1yVnDRX79LCgTO_fV9L4L4iXG4P5RJfEqvemYc6oFM/s400/Rob+Tomlinson+29er+022.jpg)
The fillet brazed seat cluster with my custom bent seat stays and bridge.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgl4GGv3CTwI2wzsRKc5UiJm6dgErVGA3SW5fH-c5A0O3wFpZhZ-tgfWIQjzZd0pRIS1ktY7sE56I9wXVgSh6DzsIEb3YfxsDhM4q_tN0Zlcfx15yZ3FrsvdefgghMquwKH-Uu4l9UxB0qz/s400/Rob+Tomlinson+29er+032.jpg)
Paragon dropouts. I'm really liking these!
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWY2qDRx20E5lh4gwqNNLYp2f0qZarlIMR2mRXj_AiOrOWMHMbyDa6oXh3c9sdzaRsH-Xj4Bq7fO1V8zEws0gIWMG75enHPmJ6CG-tcQUdFIgNq8regsGcTGoJZxW3C1Kv85wN9iFfIWz1/s400/Rob+Tomlinson+29er+033.jpg)
A shot of all the curvy stays and bridges.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnJTcrn1eD_hFQAGIEEDAsAzd3ctrOYKJTNZqQlEnOHRR5tgZFWwdIcGHTJFd8cNeH6fVCU9JIxfAoHBaK6xqnqFwlxBbGQDnxAtu4lxgA1kCIFvxWeQp_E86wEMsGLwjz79u7Cu3w3BlE/s400/Rob+Tomlinson+29er+028.jpg)
"I guess this one's OK"...
Cheers,
Dave
2 comments:
absolutely beautiful work, I love it.
Like the Inspector, I'm just speechless.
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