Restoring a 1983 Trek 720
#26
Senior Member
Join Date: Apr 2005
Location: Ann Arbor, MI
Posts: 16,878
Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8
Mentioned: 49 Post(s)
Tagged: 0 Thread(s)
Quoted: 1858 Post(s)
Liked 664 Times
in
506 Posts
There were 6's which have the same distance between sprockets as Regina 5's. Those 6's require 126 mm hubs unless you go with a radical and possibly risky dishing.
There were SunTour "Ultra-6's" for which 6 sprockets were spaced close enough together to fit into the same space as a standard 5-speed. Those can use a 120 mm hub.
From SunTour and others there were 7's with spacing to fit into a 126 mm hub, and some others which were a little too wide and needed 128 mm hub spacing.
So to the OP: measure the spacing between your rear dropouts (inner face to inner face). Most likely it's 126 mm, but it's worth checking. It's nearly 40 years old and could have had a lot of bumps and bruises in that time. It's also worth doing a string test to get an indication of whether the rear triangles are evenly offset.
There were SunTour "Ultra-6's" for which 6 sprockets were spaced close enough together to fit into the same space as a standard 5-speed. Those can use a 120 mm hub.
From SunTour and others there were 7's with spacing to fit into a 126 mm hub, and some others which were a little too wide and needed 128 mm hub spacing.
So to the OP: measure the spacing between your rear dropouts (inner face to inner face). Most likely it's 126 mm, but it's worth checking. It's nearly 40 years old and could have had a lot of bumps and bruises in that time. It's also worth doing a string test to get an indication of whether the rear triangles are evenly offset.
Likes For Road Fan:
#27
Newbie
Thread Starter
There were 6's which have the same distance between sprockets as Regina 5's. Those 6's require 126 mm hubs unless you go with a radical and possibly risky dishing.
There were SunTour "Ultra-6's" for which 6 sprockets were spaced close enough together to fit into the same space as a standard 5-speed. Those can use a 120 mm hub.
From SunTour and others there were 7's with spacing to fit into a 126 mm hub, and some others which were a little too wide and needed 128 mm hub spacing.
So to the OP: measure the spacing between your rear dropouts (inner face to inner face). Most likely it's 126 mm, but it's worth checking. It's nearly 40 years old and could have had a lot of bumps and bruises in that time. It's also worth doing a string test to get an indication of whether the rear triangles are evenly offset.
There were SunTour "Ultra-6's" for which 6 sprockets were spaced close enough together to fit into the same space as a standard 5-speed. Those can use a 120 mm hub.
From SunTour and others there were 7's with spacing to fit into a 126 mm hub, and some others which were a little too wide and needed 128 mm hub spacing.
So to the OP: measure the spacing between your rear dropouts (inner face to inner face). Most likely it's 126 mm, but it's worth checking. It's nearly 40 years old and could have had a lot of bumps and bruises in that time. It's also worth doing a string test to get an indication of whether the rear triangles are evenly offset.
I could buy a new rear wheel built to the correct size, but I don't see how to confidently find a freewheel that would work.
#28
Full Member
Join Date: Jul 2018
Location: WNY
Posts: 444
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 177 Post(s)
Liked 313 Times
in
162 Posts
With 10 posts, you are now free to upload photos!
__________________
72+76 Super Course, 74 P-10+ 79 Tandem Paramounts, 84 Raleigh Alyeska, 84 Voyageur SP, 85 Miyata Sport 10 mixte and a queue
72+76 Super Course, 74 P-10+ 79 Tandem Paramounts, 84 Raleigh Alyeska, 84 Voyageur SP, 85 Miyata Sport 10 mixte and a queue
#29
Senior Member
I built mine up as a 9 speed but no matter how you set yours up I think you’ll find it to be a very sweet riding frame. I was surprised how light feeling and responsive it is for a touring frame.
__________________
Nothing compares to the simple pleasure of a bike ride - JFK
Nothing compares to the simple pleasure of a bike ride - JFK
Likes For badger_biker:
#31
ambulatory senior
Join Date: Dec 2016
Location: Peoria Il
Posts: 5,998
Bikes: Austro Daimler modified by Gugie! Raleigh Professional and lots of other bikes.
Mentioned: 76 Post(s)
Tagged: 0 Thread(s)
Quoted: 1955 Post(s)
Liked 3,661 Times
in
1,679 Posts
Likes For 52telecaster:
#32
Senior Member
Likes For badger_biker:
#33
ambulatory senior
Join Date: Dec 2016
Location: Peoria Il
Posts: 5,998
Bikes: Austro Daimler modified by Gugie! Raleigh Professional and lots of other bikes.
Mentioned: 76 Post(s)
Tagged: 0 Thread(s)
Quoted: 1955 Post(s)
Liked 3,661 Times
in
1,679 Posts
Likes For 52telecaster:
#34
Senior Member
I had it powder coated so it isn’t fair to compare with an original and I don’t have the nice head tube paint to match the decal like from the factory.
__________________
Nothing compares to the simple pleasure of a bike ride - JFK
Nothing compares to the simple pleasure of a bike ride - JFK
Likes For badger_biker:
#35
ambulatory senior
Join Date: Dec 2016
Location: Peoria Il
Posts: 5,998
Bikes: Austro Daimler modified by Gugie! Raleigh Professional and lots of other bikes.
Mentioned: 76 Post(s)
Tagged: 0 Thread(s)
Quoted: 1955 Post(s)
Liked 3,661 Times
in
1,679 Posts
They matched up fine with the rims but felt mushy or soft at first. I tweaked the angle of the straddle cable so they grabbed before my levers ran out of play. Pretty good now.
I had it powder coated so it isn’t fair to compare with an original and I don’t have the nice head tube paint to match the decal like from the factory.
I had it powder coated so it isn’t fair to compare with an original and I don’t have the nice head tube paint to match the decal like from the factory.
Likes For 52telecaster:
Likes For pjw77: