Arrow Frame / Suspension

The original frame's castor angle of the front fork can be reduced by appr. 5 mm
by replacing the 4 washers below the U-attachment of the front cylinder with thinner
  In order to regain the original geometry, the front fork must now be
  an additional 5 to 10 mm into the fork bracket.
this makes your TR1 even more agile...

..and on to the ...

Front Suspension