650b Custom Bike Project: Steel Kickback Two Speed
Monday, January 31, 2011 at 10:47PM The next project will be a custom 650b wheel bike. 650b/27.5" wheels are proving to be a much better fit for riders in the 5' 8" - 6' 2" height range than the 29" wheel platform. The project is still shaping up but so far this is how it looks:
Rider Dimensions:
Inseam: 31.5" = 80 cm
Torso: " = cm
Arms: " = cm
Shoulder: " = cm
Height: 5'-10" = 178 cm
Reccomended standover height = 82.55 cm
Reccomended saddle height = 70.65 cm
Reccomended effective top tube length =
Best Fitting Bike Dimensions:
Frame: Custom, Hand-built in USA, Double butted
T/T:
D/T:
S/T:
H/T:
C/S:
S/S:
Dropouts: Paragon horizontal
Braze Ons: Seat clamp, CB tab
Frame Color: Tequila
Decal Color:
Fork: Custom, Made in USA, Rigid
Blades:
Dropouts:
Steerer:
Crown Race:
A/C:
Dropout width:
Fork Color:
Wheels: Hand-built
Rims: 650b silver
Front Hub: Sturmey Archer HBT, High - polish silver
• Hub Shell Material - 6061 Aluminum
• Bearing Type - Sealed Cartridge x 2
• Axle Diameter - 9mm
• Axle Length - 145mm
• Over Locknut Dimension - 100mm
• Spoke Holes - 32 H
• Pitch Circle Diameter - 61.5mm
• Center to Flange Right - 35.3mm
• Center to Flange Left - 35.3mm
• Flange Width - 71.5mm
• Spoke Compatibility - 13g or 14g
• Weight - 273.5g
Rear Hub: Sturmey Archer S2C 2 speed kickback rr hub with Coaster rakeB, High polish silver
- Hub Shell Material - 6061 Aluminum
• Axle Diameter - 13/32” Slotted
• Axle Length - 162mm
• Over Locknut Dimension - 116mm
• Right Axle Protrusion Length - 23mm
• Left Axle Protrusion Length - 23mm
• Spoke Holes - 36
• Pitch Circle Diameter - 67mm
• Center to Flange Right - 26.9mm
• Center to Flange Left - 29.7mm
• Flange Width - 53mm
• Spoke Compatibility - 13g or 14g
• Sprocket Teeth - 13T through 22T
• Chain Line: 3/32” Dished 44.9mm
• Weight - 1400g
Gear Ratio
• Overall Range - 138%
• Gear 1 - 100% Direct Drive
• Gear 2 - 138% (+)38% (Gear 1 + 38%)
Spokes: Stainless steel, silver
Nipples: Brass
Rimstrips:
Tubes: 650b P/V
Tires: 650b
Brakes: Sturmey Archer coaster brake
Headset: Chris King, Sotto Voce, Silver
BB: Silver
Crankset: Sturmey Archer FCS74 Series, polished silver, 175mm
• Number of Teeth - 44T
• Chainring Material - A5 Aluminum
• Removable Chainrings - Yes
• Crank Style - 4 Arm Spider A Crank
• Crank Arm Material - A356.2 Aluminum
• Crank Arm Length - 175mm
• Chainring Bolts & Nuts - SCM435 Chromoly
• Bolt Circle Diameter - 104mm
• Chainguard Outer - A5 Aluminum
• Chainguard Inner - Hi-Tensile Steel
• Suggested Bottom Bracket - Sunrace BBS15 or BBS20
• Spindle Length - (D) 110mm
• Chain Line - 45mm
• Total Weight - 610g (175mm)
Pedals: TBD
Chain: Silver
Handlebar: On One Mary Bar, silver
Stem: Nitto
Grips: Brooks leather
Seatpost: Nitto
Saddle: Brooks Swift
Length: 272mm
Width: 150mm
Height:72mm
Weight: 510g
Frame: Chromium Plated Steel
Pedals: TBD
Much more to come..... please check back and follow the design and build of another custom cycle from Alpine Designs.
