Twelfth Bike

or Ride What You Will

Posts Tagged ‘Gran Bois Tires’

650b Conversion!

Posted by Susan on June 1, 2011

Liz loved her Casati, but felt limited by the high pressure skinny tires. This light and fast Italian racing bike made a good candidate for a 650b conversion.

Liz with her Casati

Liz loves her Casati

The 650b Conversion allows her to ride with a larger tire, which means she can now ride our favorite dirt paths.

650b allows for more tire clearance on the casati

32c Gran Bois 'Cypress' tires fit the frame, with room for fenders, if desired

Before the conversion Liz’s saddle was too low to permit clearance for a Carradice Saddle bag. But now, there’s plenty of room!

Carradice bag on the casati

Now the Carradice won't drag against the tire.

Also, there is no more toe overlap!

No toe overlap

No more toe overlap!

Liz enjoys riding this bike more than ever. With the fatter tires, it is more comfortable over Boston’s rough roads and able to conquer many a dirt path. She can’t wait to ride it at D2R2!

liz riding with lucy

Lucy likes 650b!

Some notes about the Casati set up

It sports a compact double crankset. Again, I converted a triple to a double using a chainguard for the outer ring. Due to oversized oval tubing (Columbus Oversized EL tubing ) The Casati cannot take a clamp-on derailleur.  This presents a problem, as the derailleur braze on is located too high for use with a compact crankset. The problem is solved using a triple derailleur with a chainguard. Right now, gearing is 44, 32.

Another triple converted to a double.

Another triple converted to a double.


Posted in 650b Conversion, Bikes for D2R2, Casati, Gran Bois Tires, Italian bikes, Steel Bikes | Tagged: , , , , , , , , | 6 Comments »