Flat Rim Society
07-04-25 | 04:08 PM
#1
Thread Starter
Newbie
Joined: Jun 2025
Posts: 27
Likes: 156
From: DELMARVA
Bikes: 1975 Fuji Dynamic 10(w/upgrades), 1986 Bianchi Super Leggera
Flat Rim Society
My Mavic MA40’s have failed! After just 40 years of riding I’ve got a flat spot on the rear rim! These are the replacement wheels I “upgraded” to for my 1975 Fuji Dynamic 10 and purchased from Performance in 1984ish. Hubs are Suntour Cyclone and appear just fine.
What wheel builders are available around DELMARVA that would build using my hubs?
Rick
PS Actually wonderfully happy these wheels rolled so long. Used, abused, rode home wet way too often.
What wheel builders are available around DELMARVA that would build using my hubs?
Rick
PS Actually wonderfully happy these wheels rolled so long. Used, abused, rode home wet way too often.
07-05-25 | 05:13 AM
#2
Senior Member
Joined: Apr 2007
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From: Thunder Bay, Ontario, Canada - burrrrr!
Bikes: 1958 Rabeneick 120D, 1968 Legnano Gran Premio, 196? Torpado Professional, 2000 Marinoni Piuma
Show me a decent picture of the flat spot. I have managed to repair such problems with very little effort or time spent. I might even have a spare rim or spare set, in case you are in need. Show the pics please.
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"98% of the bikes I buy are projects".
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07-05-25 | 06:32 AM
#3
Thread Starter
Newbie
Joined: Jun 2025
Posts: 27
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From: DELMARVA
Bikes: 1975 Fuji Dynamic 10(w/upgrades), 1986 Bianchi Super Leggera
Randy
Super and thanks much. I’ll post photos soon. Currently serving newbie probation time. More later.
Rims are still rolling and I’m on the bike this week doing rail trails in Catskills. Had them inspected before leaving home.
Thanks, Rick
Super and thanks much. I’ll post photos soon. Currently serving newbie probation time. More later.
Rims are still rolling and I’m on the bike this week doing rail trails in Catskills. Had them inspected before leaving home.
Thanks, Rick
07-05-25 | 08:25 AM
#4
Super Moderator
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From: Ffld Cnty Connecticut
Bikes: Old Steelies I made, Old Cannondales
You should be able to post pics to your profile gallery without having 10 posts.
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Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
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07-05-25 | 08:53 AM
#5
Senior Member
Joined: Sep 2009
Posts: 1,391
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From: EagleRiver AK
DIY flat spot fix therapy is to completely loosen spokes directly above flat spot, suspend the wheel on stout pole or board and pull/hang on it with all your weight to pull the flat spot back outward enough that you can tension and re-true the wheel. Also make sure the spokes 180° from the flat spot are not too tight, pulling the entire wheel in that direction. Alternately, here are even tools made that locate on the hub and push outward on the flat spot to provide force to reset the flat spot bend.
Final terminal death of MA40 I have experience is when it cracks at an eyelet and a spoke starts pulling the eyelet through the rim.
Final terminal death of MA40 I have experience is when it cracks at an eyelet and a spoke starts pulling the eyelet through the rim.
07-05-25 | 08:57 AM
#6
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Joined: May 2008
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From: Fredericksburg, Va
Bikes: ? Proteous, '65 Frejus TDF, '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '89 Pinarello Montello, 'Litespeed Catalyst'94 Burley Duet, 97 Specialized RockHopper, 2010 Langster
The Bott had a wheel with a "flat" spot in it. I fixed that
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Bikes don't stand alone. They are two tired.
Bikes don't stand alone. They are two tired.
07-06-25 | 06:28 AM
#8
Thread Starter
Newbie
Joined: Jun 2025
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From: DELMARVA
Bikes: 1975 Fuji Dynamic 10(w/upgrades), 1986 Bianchi Super Leggera
07-06-25 | 06:50 AM
#9
Senior Member
Joined: May 2008
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From: Fredericksburg, Va
Bikes: ? Proteous, '65 Frejus TDF, '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '89 Pinarello Montello, 'Litespeed Catalyst'94 Burley Duet, 97 Specialized RockHopper, 2010 Langster
the rasp was used to create the curve for the wood against the rim curved surface. The big pain was the hit to create the "flat" spot.
Identify where the greatest displacement is and mark it (x) then find the transition points (|) and clamp. Keep moving the transition points until there is no displacement.
Identify where the greatest displacement is and mark it (x) then find the transition points (|) and clamp. Keep moving the transition points until there is no displacement.
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Bikes don't stand alone. They are two tired.
Bikes don't stand alone. They are two tired.
07-06-25 | 09:03 AM
#10
Bianchi Goddess
Joined: Apr 2009
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From: Shady Pines Retirement Fort Wayne, In
Bikes: Too many to list here check my signature.
rodonnel Good Morning and welcome to the forums! Great looking old Fuji. Can you post a pic of the wheel shows the flat spot? As others have suggested if it isn't too bad a good wheel builder should be able to get a flat spot out. How do you hubs look inside?
Are these sealed cartridge bearing? or just a rubber seal around the cone?
Nice looking Bianchi
Are these sealed cartridge bearing? or just a rubber seal around the cone?
Nice looking Bianchi
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
07-06-25 | 05:22 PM
#12
Thread Starter
Newbie
Joined: Jun 2025
Posts: 27
Likes: 156
From: DELMARVA
Bikes: 1975 Fuji Dynamic 10(w/upgrades), 1986 Bianchi Super Leggera
SJX426
Understood and thanks for explaining. I’ll look closely at the rim after getting home to MD. Right now wheels are covered in stone dust. My wife and I are in New Paltz, NY area. I’ll post some comments in another forum. Also recommendations for a good wheel builder Philly/Balt/DC welcomed.
Rick
Understood and thanks for explaining. I’ll look closely at the rim after getting home to MD. Right now wheels are covered in stone dust. My wife and I are in New Paltz, NY area. I’ll post some comments in another forum. Also recommendations for a good wheel builder Philly/Balt/DC welcomed.
Rick
07-06-25 | 05:29 PM
#13
Thread Starter
Newbie
Joined: Jun 2025
Posts: 27
Likes: 156
From: DELMARVA
Bikes: 1975 Fuji Dynamic 10(w/upgrades), 1986 Bianchi Super Leggera
Bianchi Girl
Thanks for the compliments and question. My Bianchi is like I bought her. Just tires, bar tape (needs new) and pedals are changed. Oh and a friendlier freewheel for tired legs.
Regarding those hubs…. I’ll have to check. Covered in stone dust today. More later.
Rick
Thanks for the compliments and question. My Bianchi is like I bought her. Just tires, bar tape (needs new) and pedals are changed. Oh and a friendlier freewheel for tired legs.
Regarding those hubs…. I’ll have to check. Covered in stone dust today. More later.
Rick
