Ironman freewheel Change Help
02-20-19 | 11:03 AM
#26
Senior Member
Joined: Aug 2011
Posts: 22,676
Likes: 2,643
From: CID
Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)
I do agree that modding a 7-speed HG cassette and using a UG small cog would be the best way forward. You can still find them out there.
02-20-19 | 12:40 PM
#27
Thread Starter
Full Member
Joined: Apr 2018
Posts: 201
Likes: 39
Correct but you will need the screw on sprocket from your original UG cassette. In the video he's using this for a 6 speed however yours is for 7 speed so you should be even easier. I think so too that this is the easiest method if keeping same wheels and 7 speed. But if you just want to get it back on the road then getting the wheels from robbietunes seems like a good option and the you can just screw on your new freewheel
You have the '88 or '89 master?
I've learned through trial and error, considering Centurion Ironman came in screw on freewheel, Uniglide, and my '89 Master came in Hyperglide.
You have the '88 or '89 master?
I've learned through trial and error, considering Centurion Ironman came in screw on freewheel, Uniglide, and my '89 Master came in Hyperglide.
02-20-19 | 01:13 PM
#28
Senior Member
Joined: Jun 2015
Posts: 4,278
Likes: 652
From: Heart Of Texas
Bikes: '85, '86 , '87 , '88 , '89 Centurion Dave Scott Ironman.
I'm not sure all '89 master IM came in HG but mine did. Do you have the yellow white fade? That is a sweet looking and riding ride. Like you I had an all original one but now my riding buddy has it however its now sporting a complete group (including hubs) 9 speed ultegra. Doh can't find a pic of the one I had.
02-20-19 | 02:16 PM
#29
Junior Member
Joined: Aug 2017
Posts: 130
Likes: 11
From: Atlanta
Bikes: '87 Centurion Ironman Expert, '88 Basso Loto, '89 Panasonic MC-5500, '92 Vitus 992
02-20-19 | 06:14 PM
#30
Thread Starter
Full Member
Joined: Apr 2018
Posts: 201
Likes: 39
I'm not sure all '89 master IM came in HG but mine did. Do you have the yellow white fade? That is a sweet looking and riding ride. Like you I had an all original one but now my riding buddy has it however its now sporting a complete group (including hubs) 9 speed ultegra. Doh can't find a pic of the one I had.
I assume switching over everything to ultegra 9 speed brings the weight down quite a bit.
02-20-19 | 08:52 PM
#31
Senior Member
Joined: Jun 2015
Posts: 4,278
Likes: 652
From: Heart Of Texas
Bikes: '85, '86 , '87 , '88 , '89 Centurion Dave Scott Ironman.
I had one of those too. Honestly I don't remember if there was any difference in weight when I went from stock 7 speed tricolor to 9 speed ultegra. But I do remember that purple rain frame being so light especially compared to my '89 expert it made me believe the master frames are lighter than the expert frames.
Either way, you got a nice Ironman.
02-21-19 | 05:56 AM
#32
Freewheel Medic
Joined: Oct 2005
Posts: 13,569
Likes: 3,314
From: An Island on the Coast of GA!
Bikes: Snazzy* Schwinns, Classy Cannondales & a Super Pro Aero Lotus (* Ed.)
[MENTION=480142]Kars[/MENTION], switch to friction shifting (your shifters can do that) and modify a 9 speed HG cassette to fit on your UG freehub. You will find that friction shifting on HG sprockets to be smooth and easy. This is the simplest solution and you gain an extra gear.
My two cents is that 9 speed Ultegra would add weight (albeit an imperceptibly small amount).
My two cents is that 9 speed Ultegra would add weight (albeit an imperceptibly small amount).
__________________
Bob
Enjoying the GA coast all year long!
Thanks for visiting my website: www.freewheelspa.com
Bob
Enjoying the GA coast all year long!
Thanks for visiting my website: www.freewheelspa.com
