Tuesday, December 7, 2010

Bike project 1: Donor bike part 2

 Before cutting the donor bike apart I took measurements to use as references during the design.  Here they are.  All measurements in inches.

Wheels Front Rear
Radius 13.00 13.00
Tire width 1.98 2.19
Tire height 1.71 1.73
Skewer length with nuts 5.75 7.19
Sekwer diameter 0.19 0.19
Hub    
  Flange diameter 1.86 2.13
Radius 0.93 1.06
  Flange thickness 0.13 0.14
  Non-flange diameter 1.09 1.30
Radius 0.55 0.65
  Exterior length 2.82 2.24
  Interior length 2.58 2.01
Axle length 4.25 5.71
Half 2.13 2.85
Length less engagements 1.83 2.55
Axle diameter 0.34 0.39
Radius 0.17 0.19
Axle engagement    
  Cluster side 0.15 0.21
  Non-cluster side 0.15 0.19
Axle end to wheel enterline    
  Non cluster side 2.09 2.91
  Cluster side 2.09 2.84
  Average 2.09 2.88
Axle flange exterior to axle end    
  Non cluster side 0.67 1.53
  Cluster side 0.67 1.98
     
Axle from outside non-cluster to cluster side Exposed axle; lock nut; Dust sear;Bearing nut; assembly is symetric Exposed axle; lock nut; dust seal; bearing nut; hub; dust seal; bearing nut; spacer; locknut; exposed axle
Spokes 18 per side 18 per side
Rim    
  Width 1.05 1.10
  Height 0.65 0.67
Rear cluster    
  Largest diameter na 5.45
  Smallest diameter na 2.26
  Thickness na 1.41
  Number gears na 7.00
  Deapth na 1.46
     
     
     
     
     
     
     
Front fork    
Length on center line 14.56  
  Dropout lead from headset center line 2.00  
  Straight section length to center of fork tubes 0.77  
  Length on center line to dropout flange 14.00  
  Head tube diameter `  
  Stearing tube height 2.25  
Dropout height 1.50  
Length from race nut to dropouts 17.00  
Axle lead from head tube center line 2.13  
Tube diameter 1.00  
Width outside at tubes 5.11  
Interior width between dropouts 3.93  
Exter width between dropouts 4.45  
Drop out deapth 0.63  
Drop out width 0.39  
Drop out thickness 0.21  
Width outside at dropouts 4.42  
Brake offset from drop out 10.00  
Angle of head tube, degrees from verticle 19.00  
Head tube     
  Bottom of tube exclusive of race to ground 27.63  
  Top of tube exclusive of race to ground 31.63  
  Diameter 1.51 0.75
Radius 0.75  
  Length between race nuts 4.28  
  Race nut height  0.43  
  Race nut diameter 1.83  
     
Rear fork    
Centerline from dropout center to bottom cross tube 14.13  
Dropout    
  Interior width between 5.35  
  Exterior length between 5.76  
  Thickness 0.20  
  Width 0.40  
  Deapth 0.67  
Offset from center line to cluster dropout center    
Offset from center line to non cluaster dropout center 2.70  
Length rear arm cluster side to center of dropout 14.44  
Length rear arm non cluster side to center of dropout 14.00  
Bulge for tire from cross tube    
  Start 1.50  
  End 2.50  
  Width in center of bulge 2.88  
Break offset from dropout center 10.00  
     
Crank    
Width    
  Including nuts 2.89  
  Exclusive of nuts 2.67  
Total width including arms 8.00  
Housing diameter 1.60  
Crank arm    
  Pedal center to crank center 6.81  
  Crank center to end of arm 7.50  
  Crank center to pedal end 8.75  
Height from ground 11.63  
Pedal    
  Length 4.00  
  Width 3.50  
  Height 1.15  
     
Gears    
  Rear    
1 34  
2 24  
3 22  
4 20  
5 18  
6 16  
7 14  
  Front    
1 48  
2 38  
3 28  

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