Specifications
Finally, retighten the two  outer lock nuts (C) to 
secure the new adjustment and retigthen the two 
axle nuts (B). At last reattach the maintenance co-
vers (A).
Check if belt drive is rmly tighten and does not slip 
while riding under resistance load. In case that the 
belt slips, proceed using the same technique as 
described above. Please note that a belt drive gear 
never shows slack. In case of adjustment do not
apply too much tension.
The manufacturer recommends using an ultrasonic
voltage meter adhering to a natural frequency of 
the belt of 3200 Hz ± 150Hz. Ball bearing damage 
due to incorrect belt tension is excluded from 
warranty.
Version 1.1 2010 SB and 2010 TLS Copyright by Indoorcycling Group GmbH | www.indoorcycling.com    ENG 28
Graphics are the right side
of the Bike (riding position)
4. Belt drive
Important: A loose belt as well as an over-
tightened belt may cause injury of the rider or dama-
ge to the drive system. Checking belt tension: To 
check for a loose belt, sit on the saddle, place your 
feet on the pedals, move the pedals until the crank 
arms are horizontal. Next, pull up the emergency 
brake handle and hold it. Then, stand on the pe-
dals and rock forward andbackward. There should 
be no play or slip in the drive train. If there is slip or 
play in the drive train, this indicates that the belt is 
too loose. Correct a slipping belt drive train: To 
adjust the belt, pull off the right and the left mainte-
nance covers (A). Loosen the axle nut (B) on both 
ends of the ywheel axle by two full turns. Loosen 
the inner adjustment nut (D) facing the ywheel axle  
on each  side of the ywheel.  Next,  losen the lock 
nut (C).
Then, turn both (right and left sides) of the in-
ner adjustment nuts (D)  on  the  intside  of  the  y-
wheel bracket ¼ of a turn at atime (upward on 
the R side and downward on L side) until the belt 
is properly adjusted. Make sure to turn both ad-
justment nuts exactly the same amount to avo-
id  misalignment  of  the  ywheel.  Re-check  if 
the amount of play or slip in the drive train has  
disappeared. 
A
B
C
4
D
D
C
PREVENTATIVE MAINTENANCE
ENGDEU ESP










