Difference between revisions of "PVD NYC"

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(PVD 'Rise' Stem)
(650c Paired 16 spoke wheels)
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*1.250 Split Handlebar Clamp
 
*1.250 Split Handlebar Clamp
  
==650c Paired 16 spoke wheels==
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==650c 16 spoke wheels==
This is an experiment. 16 spokes on a 32 hole hub/rim. The spokes will be configured in a paired configuration at maximum tangency to the hub. 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. Two spokes will meet the rim from the forward side of the hub, then two holes are skipped, then two spokes will meet the rim from the rear of the hub. I will be using butted 2mm spokes and the new DT hex nipples to handle the increased tension in the system.
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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.
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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.

Print

PVD-NYC.gif

Tubes

PVD-NYC-Tubes.gif

  • 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.

Paint

Urban... hummm.

Parts Spec

Weight

Details