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Paragon Disc Dropout conversion

31 Mar

John bought this Jamis quest frame with a cracked dropout. He got it for a good price and saw a project to be had.

Jamis Quest with a cracked dropout

Jamis Quest with a cracked dropout

After a bit of discussion he decided he would like to have the option of fitting disc brakes and asked me to fit a set of Paragon Machineworks disk dropouts.

Paragon Machinworks

Paragon Machinworks

I had never worked with them before and the surgery proved to be rather radical.

Jamis Quest surgery

Jamis Quest surgery

First of all they are much longer than usual road dropouts because they incorporate the disk mount. My usual method of mounting a disk brake is to braze a separate disk tab onto the stay. This means that the tab doesn’t have to be parallel to the stay. With the Paragon dropouts the tab and dropout are one. So, in order to get everything aligned the stays had to be cut much shorter and then spread just a bit further than usual and  the dropouts fitted to come straight back.

Brazed and primed

Brazed and primed

Luckily the chainstays on the Jamis don’t go straight back out of the Bottom Bracket. They sweep out about halfway along enabling clearance for the crank. I am pleased with the end result and hope it provides all the options John imagines

With calliper and hub

With calliper and hub

Paragon tabs straight back

Paragon tabs straight back

Paragon Machineworks brazed

Paragon Machineworks brazed

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Posted by on March 31, 2014 in Uncategorized

 

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