Difference between revisions of "PVD NYC"
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*1.250 Split Handlebar Clamp | *1.250 Split Handlebar Clamp | ||
| − | ==650c | + | ==650c 16 spoke wheels== |
| − | This is an experiment. 16 spokes on a 32 hole hub/rim. The spokes | + | This is an experiment. 16 spokes on a 32 hole hub/rim. The spokes were going to be configured in a paired configuration, but after some discussions with one of the most notorious wheelbuilders in the country, the dicision was made not to. Gravy said that without a special drilling on both the rim and hub the rim would snake. Not good. A skip spoke pattern, he assured me, would stay true. I may still be too heavy for the wheels, but at least the wheel can make it onto the bike. |
| + | |||
| + | As any wheelbuilder knows, the goal of a cross spoke pattern is to have the spkes at maximum tangency to the hub flanges. This reduces the wind up the wheel suffers under the induced torque from driving and braking. For most hubs and rims, a 4 cross pattern is the closest to this limit that can be acheived. Sizing the spokes for 32 4-cross is the same as 16 2-cross, so that gives an idea how the wheel will come together. I will be using butted 2mm spokes and the new DT hex nipples to handle the increased tension in the system. | ||
*Alex R390 571x13 rims | *Alex R390 571x13 rims | ||
Revision as of 14:26, 29 December 2008
This is a concept bike that I'm trying out. 650c wheels and disc brakes on a fixed gear drive. Designed more for slow speed manuverability and safety than full speed road handling.
Contents
Tubes
- Down Tube - 1.250 - True Temper HOXPLAT06, 680mm, .7/.4/.7, 89/51/392/38/110
- Top Tube - 1.000 - True Temper HOXPLAT01 620mm, .7/.45/.7, 60/51/381/38/90
- Seat Tube - NOVA External Butt Seat Tube, 28.6/30.0 X 460 [1]
- Chain Stay, Drive - Dedacciai COM12.5 Road 24mm Chainstay, 16/30 OVAL, Straight, [2]
- Chain Stay, Non-drive - Dedacciai COM12.5 Road 24mm Chainstay, 16/30 OVAL, Straight, [3]
- Seat Stays - True Temper HOXRCXSS, 16mm to 10mm, 600mm, 0.61mm wall
- Bottom Bracket - PVD Hollowtech II Shell, Road, 86.5mm wide x 1.75" Ø
- Dropouts - PVD Designed IF Dropouts
- Braze-ons - Pacenti Hydro
- Headtube - PVD Design
PVD 650c Disc Fork
- 340 axel to crown
- 35mm offset
- Paragon thin disc tab, cut and mounted for 140mm rotor
- True Temper Versus MSRDLT 28.6mm, 1.65/1.14 Steerer
- True Temper Platnum HOXPLAT-CS4 27.6x20, .76/.56 Oval Blades
- 1.000"x0.035" struts @ 45 degrees
- Special Alpha Q Star Nut
- Generic 9mm Dropouts
PVD 'Rise' Stem
- 140mm @ 49 Degree
- 1.250x0.035 tube, custom bent
- 1.125 Steerer Clamp
- 1.250 Split Handlebar Clamp
650c 16 spoke wheels
This is an experiment. 16 spokes on a 32 hole hub/rim. The spokes were going to be configured in a paired configuration, but after some discussions with one of the most notorious wheelbuilders in the country, the dicision was made not to. Gravy said that without a special drilling on both the rim and hub the rim would snake. Not good. A skip spoke pattern, he assured me, would stay true. I may still be too heavy for the wheels, but at least the wheel can make it onto the bike.
As any wheelbuilder knows, the goal of a cross spoke pattern is to have the spkes at maximum tangency to the hub flanges. This reduces the wind up the wheel suffers under the induced torque from driving and braking. For most hubs and rims, a 4 cross pattern is the closest to this limit that can be acheived. Sizing the spokes for 32 4-cross is the same as 16 2-cross, so that gives an idea how the wheel will come together. I will be using butted 2mm spokes and the new DT hex nipples to handle the increased tension in the system.
- Alex R390 571x13 rims
- DT Competition, 2.0/1.8/2.0 Spokes
- DT Hexagonal Nipple, 12mm, Brass
Paint
Urban... hummm.
Parts Spec
- Shimano Ultegra Cranks
- Surly Fixed/Disc rear hub (WTB Single Duty Freehub option)
- Shimano Road Cable Disc Brakes
- Shimano Deore XT pedals (Fixed), Shimano PD-A520 (Free)
- Shimano Dura-ace 10spd chain
- 49 Degree x 140mm stem ala PVD
- Headset - Cane Creek IS-2, Black.
- Kalloy Guizzo, 27.2mm 0mm offset seatpost (Thomson option)
- WTB Devo saddle
- Kenda Kaliente 650x23c tires
- Shimano XT Centerlock Front Hub.
- Shimano XT Rotors. 140mm front, 140mm rear
- Handlebar - FSA K-Wing Ergo, 31.8mm, 42cm x 145 drop x 90 reach
- Bar Tape - Fi'zi:k Microtex Synthetic, Black
- Post Clamp - Salsa Lip-Lock, 30.0
- Seatpost - Kalloy Guizzo SPC-100, 27.2mm (Option - Easton EC90 Zero Offset)
- Saddle - WTB Lazer V
