Showing posts with label custom. Show all posts
Showing posts with label custom. Show all posts

Friday, November 14, 2014

David's 29er+ #2: How to Build a Full Custom Oversized Plus Frameset in Four Days

How to Build a Bike in 4 Days:
This was the second, and final, attempt at nailing down a the perfect frame with David's custom geometry and 3.0 Knards. It was a big (sic) challenge, but given the outcome of the last frame (BB too high and TT too short) and I had my reservations on the final product. Alas, I actually had the privileged to ride it yesterday, and it feels perfect. David commented that it rode so smooth on the road that it felt like a road bike. That was the idea! I'm stoked.

Since the first frame was off (it will actually fit me perfect 26" winter tires, more later...) I had to push to get this into the painter s soon as possible. With the last of the parts coming in on Thursday and the painter scheduled for Monday, that meant 4 days to put the whole thing together, start to finish.

Day 1: Pulled out the drawing sheet and rough cut all the tubes. Laid out the master drawing and
mitered the main triangle, with the help of the new tube notching clamp I picked up on sale. I also mitered out the chain stays and fork blades, mostly by hand, with a little help from the mill. Once everything fit together properly, I tacked it in the jig and welded most of the front triangle and fork.

Day 2: Worked on the rear Triangle, cutting, mitering, tacking, checking, and welding it all together. Given the complex geometry from the oversized tires and spacing, this took lots of measuring three times and mocking up tire clearances and spacing. But, It turned out great!


Day 3: Finished welding the fork joints,
and disc tab. Mitered bridges,
created the custom dog leash loop,
welded them in, then marked and cut all of the braze-ons.

Day 4: Brazed in all of the accessories; front and rear rack, fender, bottle and cable mounts, cleaned up the joints, and checked final alignment. All within tolerance. Tapped in the serial number. DONE!

Monday, October 13, 2014

29er+ Frame Set for Sale! - $800



This frame is super light, hand built right here in beautiful Minneapolis with Columbus Aero Tubing and made to tightly fit a maximum tire size of 3.0 Knards. It could easily handle 26x2.+ or 650bx2.5 with clearance for fenders, mounts for front and rear racks, and would make a great winter bike/commuter. It is designed for a tall (6ft) rider. It is comparable to a Marin Muirwoods 29er, but sits up higher (with bigger tires on it). 4130 Chromoly steel with Matte 'midnight black' powder coat finish. Even has a custom dog leash tie bracket!

If you are interested in a big and light oversize tire bike, please email me before it gets nabbed!! $800 o.b.o. See geometry below:







 Geometry (with Knard 3.0s) in mm:

Seat Tube Length 571.5



Top Tube Length
(Center-Center)
591.5



  Effective Top Tube Length     
(Center-Center)
604



Head Tube Angle 71



Seat Tube Angle 73.5



BB Drop 35



Chainstay Length 450



Wheelbase 1090



Standover Height 855



Head Tube Length 120



Fork Length 460





                             Fork Rake                  45 

 





Friday, January 24, 2014

Setting up shop: Jamison's Framebuild #1

Alas, some crude shots of mitering and filing the tubes for Jamison's South Side Single Speed:







Finally, a heated space to work in the winter! I'm stoked to be working with Alex of Prairie Crow; he's mastering the torch, and doing a great job of it from what I can see.

The mill is set up for mitering tubes at a good pace, and the jig helps with putting everything together. Starting with the seat tube, the whole front triangle is mitered and fit together. The next step steps are to miter and fit the rear triangle, shore up the head and seat tubes, then drill some breather holes before welding.


We are working out of the Real Resources building next to the Midtown Greenway and Brackett park in S. MPLS. Feel free to email or call to set up a visit or appointment for designing yer next bike!