PVD 5.5" Fork Hardtail Aluminum
This is going to be my first aluminum bike, so I have a few details to work out.
Contents
Geometry
Tubeset
Easton Ultra-Lite 7005 Taperwall MTB tubeset
- Down Tube - 429351
- Top Tube - 329375
- Seat Tube - 129338
- Chain Stay - S-Bend, 045715
- Seat Stay - 12° bend??, 529548
7005 Aluminum Stock
This tubing is widely available as special bicycle tubing, but is rare to find as bulk straight gauge tube. ASTM B221 Pertains to 7005 Aluminum in Bar Tube and Wire
One source is Fairing, Full 2008 Catalog
Odd Parts
Ahrens is selling some quality parts, the dropouts look very nice.
Head Tube and Headset
Custom Head tube
- Upper Stack - 8mm
- Lower Stack - 5.6mm
Fabrication Instructions
Easton Fabrication Instructions 7005 & 6061
Welding Practice
Welding Rod
"Use 5356, 5180 or 5183 fillers for welding 7005 frames.", Easton. "5356/5180/5183" Columbus
"Al Mg Si 05 (USA 6063) - CASTO MAG 45802" CeeWay.
Welded Up
Ageing - Heat Treating
Columbus
Frames in 7000 alloy.
The ageing of the frame realized in 7000 alloy has to be carried out 4/5 days after the welding, in two phases: 6 hours at 90°C ±5° - 4 hours at 150°C ±5°.
Easton
Artificial age for 7005 frames:
Age 6 hours at 200 degrees F (± 10 degrees F) plus 4 hours at 320 degrees F (±10 degrees F). This process
must be performed by the builder on all Easton 7005 tube sets.
