The 29er is finished. The Kona is still covered in all of the standard stickers, but that probably won’t last too long. The stem is likely a placeholder until I figure out just what size I want, and when I have figured that out I’ll chop the tandem-length hydro lines and everything should be set. All told, the build went well and the only real hangup was the seat post.
My 330mm Thomson post was too short for the rather odd 29er geometry. At the proper height, the 330mm post was inserted well beyond the minimum insertion mark, but due to the steeply sloped top tube and long seat tube extension of the frame the bottom of the post did not extend far enough into the seat tube. According to Thomson (and general opinion) the post should extend below the bottom of the top tube to minimize the risk of cracking the frame. The 330mm post only extended about halfway between the top and bottom of the top tube. The 410mm Thomson extends well below the bottom of the top tube, so problem solved.
Here are the full specs:
Specifications Size 18"
Weight 10.8kg (23.8 lbs)
Frame Kona Unit, Steel
Fork Surly Karate Monkey (w/ ground-off canti bosses)
Stem Thomson, 90mm
Handlebars Easton EA50 low-rise, 640mm
Grips Ergon GP1 BioKork
Brakes Avid Elixir CR Carbon, Roundagon Rotors (185/160)
Cassette Singlespeed spacers,
Surly 20t cog HBC steel/alloy 20t cog Chain SRAM PC1
Crankset/BB Shimano Deore 175mm (FC-M590), HBC 32t SS alloy ring (1/8")
Pedals Shimano M540
Wheels Fulcrum Redmetal 29 SL
Skewers Shimano XT
Tires WTB Prowler 29 SL, 2.1"
Maxxis Ignitor, 29x2.1"
Saddle Selle Italia Flite Titanium
Seatpost Thomson 27.2, 410mm
Lynskey Ti post, 27.2 / 400mm