Exchange Plan

As parents of little racers we understand how fast they grow out of their bicycle components.
Send us your used VSR stems and crank arms in for credit towards your next website order.

Filing an Exchange Request 

Send your used parts to:

CALCULATED MANUFACTURING
2260 CHANTICLEER AVE 1B 
SANTA CRUZ, CA

Please include the following with your package:

  • Name
  • Phone number
  • Return address
  • Email 
  • Product size, color requested  

Once we receive your used parts we will process and contact you with a credit you can use at our calculatedracing.com store.

Exchange Credit Information

Von Sothen Racing "Derringer" Micro Crank Arms 100mm - 125mm - $50 Store Credit
Von Sothen Racing "M9" Micro Crank Arms 100mm - 125mm - $60 Store Credit
Von Sothen Racing "M9" Mini Crank Arms 130mm - 157.5mm - $80 Store Credit
Von Sothen Racing Front Load Stem - $40 Store Credit