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Video
Tube Fabrication Process
How is the Hydro-form tube made?


   Cycle Frame Depot

Twenty-Niner
Push the edge of the envelope guys. Designing, testing and re-evaluating how to do things improves the 29er product line. For years 29er are not yet accepted by the pro circuit. However the Europeans are starting to review 29ers in their mainstream MTB magazines so we have a foot hold starting in that market which is good.

Frame design has to be very carefully engineered to keep the wheel base; bottom bracket, handle bar height, and chain stay lengths within reason. Not only that, but there needs to be components to match, such as tires, rims, and forks. A 29" big wheel will help roll over stuff easier but heavy wheel offset some of the advantage. A list of tubes below are commonly use in 29er frame.
Reynolds 853
Part Stock Diameter Gauge Length Notes
BX2125L T/T 31.75 0.9 / 0.6 / 0.9 680 120.50.300.50.160
BX2113 T/T 31.75 0.9 / 0.6 / 0.9 730 120.50.300.50.210
BX2151 D/T 34.9 0.9 / 0.6 / 0.9 680 120.30.320.30.180
BX2153 D/T 34.9 0.9 / 0.6 / 0.9 730 120.50.300.50.210
CX2363 S/T 28.6 0.9 / 0.6 / 1.2 550 170.50.155.75.100 bulge 27.2
CX2364 S/T 28.6 0.9 / 0.6 / 1.2 650 190.50.260.50.100 bulge 27.2
CX2280 S/T 31.75 0.9 / 0.6 / 1.2 550 165.50.260.30.125 -bulge 30.0
DG156 H/T 36 1.5 200
FX2560 C/S 17 x 27 oval 0.8 / 0.6 420 oval, bent 12 deg
GX2660 S/S 19 0.7 580 s/taper
GX2655 S/S 17 x 14 oval 0.6 570 oval, s/taper
GX2700 S/S 19 0.7 580 s/taper bent 10 deg
Reynolds 631
CX5363 S/T 28.6 0.9 / 0.6 / 1.2 550 170.50.155.75.100 bulge 27.2
CX5364 S/T 28.6 0.9 / 0.6 / 1.2 650 190.50.260.50.100 bulge 27.2
Reynolds 525
DC156 H/T 37 1.5 200 170.50.155.75.100 bulge 27.2
GC1660 S/S 19 0.7 580 s/taper
GC1661 S/S 19 0.7 580 d/taper
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