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Riders Name: |
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Current Frame Brand: |
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Type |
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Size |
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MEASUREMENT EXPLANATIONS:
Please try to get measurements to the nearest 1/8-inch or better. Frame dimensions are in order of usefulness, frame dimension & angles (t18 though t21) are difficult to measure and not necessary to design your frame, but they are helpful if you can obtain them. CL is centerline. Measure centerline to centerline of the tubes BB is the bottom bracket |
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Measure |
ROAD |
MNT. |
FRAME MEASUREMENTS |
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t1 |
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Captain BB height. CL of front bottom bracket (BB) to the ground. |
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t2 |
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Stoker BB height. CL of rear bottom bracket (BB) to the ground. |
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t3 |
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Captain BB to stoker BB spacing. CL of rear BB to CL of front BB |
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t4 |
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Captain frame size. CL of the front BB to top most part of the front seat tube. |
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t5 |
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Captain seat to crank length rider position. Measure from the top of the front seat intersection point of the seat tube CL to the CL of the front BB. |
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t6 |
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Captain Top tube length. CL of the top most part of the front seat tube to the top most CL part of the head tube. |
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t7 |
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Captains top tube, rider position. Measure from the intersection of the CL of the front seat tube on the top of the seat to the CL of the handle bar stem. |
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t8 |
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Captain's top of saddle CL of seat tube intersection to the ground. Helps establish seat height and the captain's rider position. |
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t9 |
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Head stem CL to the ground. Helps establish head stem length and angle and captain's rider position. |
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t10 |
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Stoker frame size. CL of the rear BB to top most part of the rear seat tube. |
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t11 |
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Stoker's seat to crank length rider position. Measure from the top of the rear seat intersection point of the seat tube CL to the CL of the rear BB. |
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t12 |
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Stoker's top tube length. CL of the intersection of the rear seat tube and the stokers top tube to the CL intersection of captain's seat tube. |
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t13 |
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Stoker's top tube, rider position. Measure from the intersection of the CL of the rear seat tube on the top of the seat to the CL of the stoker's handle bar stem. |
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t14 |
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Stoker's head stem CL to the ground. Helps establish head stem length and angle and stoker's rider position. |
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t15 |
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Stoker's top of saddle CL of seat tube intersection to the ground. Helps establish seat height and the stoker's rider position. |
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t16 |
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Chain Stay length. CL of the rear BB to CL of the rear axial. |
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t17 |
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The wheel base. CL of front wheel axial to CL rear wheel axial. |
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HELPFUL EXTRA MEASUREMENTS |
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t18 |
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Stoker's seat tube angle. Angle from the CL of the rear seat tube to the ground. |
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t19 |
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Captain's seat tube angle. Angle from the CL of the front seat tube to the ground. |
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t20 |
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Head tube angle. Angle from CL of head tube to the ground. |
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t21 |
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Fork rake. CL of the head tube to the CL of the front wheels axial. |
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