Bicycle Mechanics - Adding Gears

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.



PDA

View Full Version : Adding Gears

takara14
08-08-04, 06:00 PM
I recently tried putting a seven speed freewheel on an old Sunshine five speed hub. I had to add a spacer to the right side then managed to squeeze the result into the frame. The wheel wasn't centered. Not good! Are later, six speed hubs better suited to this swap or are they the same as a five speed hub?

sydney
08-08-04, 06:09 PM
I recently tried putting a seven speed freewheel on an old Sunshine five speed hub. I had to add a spacer to the right side then managed to squeeze the result into the frame. The wheel wasn't centered. Not good! Are later, six speed hubs better suited to this swap or are they the same as a five speed hub? You probably have 120 dropout spacing. There was ultra narrow 6 speed with the same spacing. later 6 and 7 speed was 126 spacing.
supcom
08-08-04, 07:39 PM
It sounds like the rim needs redished to account for the new axle length.

MichaelW
08-09-04, 11:21 AM
I have added a 6 and 7 speed freewheel to an original 5 spd hub. It didn't need any spacing or re-dishing. Just take care that there is some clearance between the cogs and frame. You shouldnt be too fussy about the chainline with this kind of upgrade.
I later swapped out the wheel for a Shimano freehub style 7spd, with a wider axle (130), and is fitted with a small amount of force.
sydney
08-09-04, 11:24 AM
I have added a 6 and 7 speed freewheel to an original 5 spd hub. It didn't need any spacing or re-dishing. It all depends on what you are starting with.