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Which freewheel for my 85 Gran Turismo?

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Which freewheel for my 85 Gran Turismo?

Old 12-19-21, 09:29 PM
  #1  
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Which freewheel for my 85 Gran Turismo?

The original 14-32 freewheel on my 85 Gran Turismo is making a creaking noise which
transmits to the frame.I have 2 old freewheels which I think will fit but not sure which one
I should use. The first one is a Shimano 13-24 6 speed and the second one is a Suntour
13-24 7speed. The chainring on the bike is a 30-46-50.
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Old 12-19-21, 09:41 PM
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It may not matter to you but you will lose low gears with those freewheels. If the original freewheel was 6, you may get some chain rub going to 7. That can be dealt with but it is a potential issue. Personally, Iíd try to service the original freewheel or find a larger freewheel than a 13-24 given that this is a touring bike.
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Old 12-20-21, 12:49 AM
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Changing from a touring freewheel to a racing freewheel on a touring bike makes no sense unless there are zero hills where you live. Send your creaking freewheel to @pastorbobnln for servicing.
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Old 12-20-21, 12:54 AM
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I would second sending it to pastor Bob. I did it once and didnít regret it. Great work and a quick turn around.
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Old 12-20-21, 02:44 AM
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Buy a Sunrace freewheel with ramped teeth for 15 bucks. Shifting is a hundred times better, especially with friction shifters.
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Old 12-20-21, 07:15 AM
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The fun is looking at the gear calculators to see which freewheels give the nicest gear spacing and the most appropriate gears. Then comes seeing how it all fits. Perhaps a 6 will work, but some axle spacers may need moved so as to prevent the chain from hitting the dropout. Then the rear wheel will need redished and then the rd needs adjusted. And then there is also chain length.
I find the whole process quite rewarding as it gets the gearing suited to your individual situation. The factory gearing often has a bunch of redundant gears, although looking at those posts of vintage magazine reviews it seems Univega is better than most with their gearing. You are opening up a whole can of worms for yourself.
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Old 12-20-21, 07:28 AM
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Originally Posted by robertj298 View Post
The original 14-32 freewheel on my 85 Gran Turismo is making a creaking noise which
transmits to the frame.I have 2 old freewheels which I think will fit but not sure which one
I should use. The first one is a Shimano 13-24 6 speed and the second one is a Suntour
13-24 7speed. The chainring on the bike is a 30-46-50.
Can you be more specific about the "creaking noise?" When does it occur? Also, what is your current freewheel and can you post pictures?

IMO, that's an unusual noise for a freewheel and I wonder if something else is causing the noise you hear.

Side note: Using my powers of deduction, I guess the OP's freewheel is a Perfect or a ProCompe.
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Old 12-20-21, 07:29 AM
  #8  
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+1, I'd go with a more modern, Hyperglide compatible freewheel for the significant shifting improvement. They'll shift, though noisily, even going uphill with a load, which can be valuable on a grand touring bicycle.
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Old 12-20-21, 08:28 AM
  #9  
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What Make Of Gran Turismo Bike?

It probably would have helped in the OP would have mentioned the brand of "85 Gran Turismo bike".... Just to put things into perspective for the rest of the members.

A lot of builders made models named Gran Turismo. For the sake of clarity, the OP's 85 Gran Turismo is a Univega brand bike.

My new 1985 Gran Turismo

My first thought was a French made Gitane "Gran Turismo" from the early 70's (spelled "Tourisme").



Medci made a Gran Turismo in 1985:

https://www.cxmagazine.com/gravel-bi...100-matt-allen
https://www.worthpoint.com/worthoped...ycle-129695974

Wilier, Bottecchia and Ducati along with a lot of others over the years did too....

"Get Off My Lawn!"



OH! That's Gran Torino....


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Old 12-20-21, 09:16 AM
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Originally Posted by pastorbobnlnh View Post
Can you be more specific about the "creaking noise?" When does it occur? Also, what is your current freewheel and can you post pictures?

IMO, that's an unusual noise for a freewheel and I wonder if something else is causing the noise you hear.

Side note: Using my powers of deduction, I guess the OP's freewheel is a Perfect or a ProCompe.
You are correct it is a perfect freewheel. I also thought it odd the freewheel would make any noise. The noise isn’t loud but I could hear it when the bike is on a rack with the chain removed. You would say ohh it’s the hub bearings and that’s the first thing I thought also. Flushed and regreased the bearings still made the noise. As an afterthought I removed the freewheel voila the noise is gone. Put an old Shimano freewheel on it. Noise is still gone. Checking the original freewheel the only thing I noticed is a very slight amount of inward and outward play in the center hole. This bike has next to no miles on it and hung in a garage for over 30 years. The noise while slight is amplified as of it is coming from the frame
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Old 12-20-21, 10:17 AM
  #11  
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Originally Posted by davester View Post
Changing from a touring freewheel to a racing freewheel on a touring bike makes no sense unless there are zero hills where you live. Send your creaking freewheel to @pastorbobnln for servicing.
The 50-46 combination in front works best as a half-step, with 13-15-18-21-24-28
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Old 12-20-21, 10:37 AM
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I also looked at the gear charts and a 14-28 six speed makes nice half steps too. Now to find one and then to make it fit. Also as posted, the 14-32 five speed makes a nice half step.
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Old 12-20-21, 10:37 AM
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1/2 Step With Granny

Originally Posted by John E View Post
The 50-46 combination in front works best as a half-step, with 13-15-18-21-24-28
The way I used to set up triples was with 1/2 step 50-46T and only used the small 28T or 30T chainring as bailout gearing with the 3 largest FW sprockets.

50-46-30T



13--32T Six Speed Narrow



With the advent of the Shimano 48-38-28T MTB triples I stopped, in the words of Frank Berto, "gear freaking". With a 7 or 8 speed cassette, I just stay on one chainring, frequently the middle and only switch to the larger or smaller as needed. Pedal by feel!

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Old 12-20-21, 11:23 AM
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Originally Posted by verktyg View Post
It probably would have helped in the OP would have mentioned the brand of "85 Gran Turismo bike".... Just to put things into perspective for the rest of the members.

A lot of builders made models named Gran Turismo. For the sake of clarity, the OP's 85 Gran Turismo is a Univega brand bike.

My new 1985 Gran Turismo

My first thought was a French made Gitane "Gran Turismo" from the early 70's (spelled "Tourisme").



Medci made a Gran Turismo in 1985:

https://www.cxmagazine.com/gravel-bi...100-matt-allen
https://www.worthpoint.com/worthoped...ycle-129695974

Wilier, Bottecchia and Ducati along with a lot of others over the years did too....

"Get Off My Lawn!"



OH! That's Gran Torino....


verktyg
Univega
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Old 12-20-21, 12:25 PM
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Originally Posted by Lazyass View Post
Buy a Sunrace freewheel with ramped teeth for 15 bucks. Shifting is a hundred times better, especially with friction shifters.
+1 this. Modern freewheels with profiled teeth (required for reliable indexed shifting) work noticeably better, even with friction shifting.

N.B. be prepared to replace the chain at the same time, as worn chains often have a difficult time meshing with new sprockets.
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Old 12-20-21, 12:36 PM
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Really, op should search for an Atom or Maillard replacement.
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Old 12-20-21, 12:54 PM
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Originally Posted by robertj298 View Post
You are correct it is a perfect freewheel. I also thought it odd the freewheel would make any noise. The noise isnít loud but I could hear it when the bike is on a rack with the chain removed. You would say ohh itís the hub bearings and thatís the first thing I thought also. Flushed and regreased the bearings still made the noise. As an afterthought I removed the freewheel voila the noise is gone. Put an old Shimano freewheel on it. Noise is still gone. Checking the original freewheel the only thing I noticed is a very slight amount of inward and outward play in the center hole. This bike has next to no miles on it and hung in a garage for over 30 years. The noise while slight is amplified as of it is coming from the frame
A Perfect! How good are my powers of deduction?

Seems like a strange noise. I can't believe I'm about to suggest this, but dribble a little oil in the freewheel around the outer bearing race/retaining ring. See if the noise goes away. If so, follow up with a good cleaning and new grease, which should solve the mystery noise. Perfect freewheels are very well built.
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Old 12-20-21, 01:10 PM
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And no one mentioned the outer lock ring on this freewheel. No expert here and have yet to take one apart, but on used ones I have purchased I have seen this loose on occasion. That could explain the wobble too. I’m going to tear a couple apart sometime just to learn.
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Old 12-21-21, 07:30 AM
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I was reading robertj298 's response on my phone in a moving car (no I was not driving, Mrs. PB was), and I missed the "in and out" play in the freewheel body halves.

It could be as sd5782 mentions above, that the bearing race/retaining ring is loose. However, I doubt this is the case and I would suggest that it has the wrong or too many spacers between the bearing race and the top "ledge" of the inner body.



There are at least two spacers and sometimes as many as four on a Perfect. Try removing the thinnest one and retighten. If this is two tight, remove the race, apply some blue Loctite to the threads, and adjust the race for optimum bearing performance.

Personally, and this is just my 2 cents worth of advice, a Suntour Perfect is a superior freewheel to an Atom or Maillard 6 speed. This is especially true since the OP reports the bike has been barely ridden. Unless the internals are loaded with corrosion, it should continue to function well for many years to go.
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Old 12-21-21, 11:30 AM
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you could go for an IRD

$70 new, 13-32

https://www.interlocracing.com/shop/...arch=freewheel
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Old 12-21-21, 11:44 AM
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Originally Posted by pastorbobnlnh View Post
I was reading robertj298 's response on my phone in a moving car (no I was not driving, Mrs. PB was), and I missed the "in and out" play in the freewheel body halves.

It could be as sd5782 mentions above, that the bearing race/retaining ring is loose. However, I doubt this is the case and I would suggest that it has the wrong or too many spacers between the bearing race and the top "ledge" of the inner body.



There are at least two spacers and sometimes as many as four on a Perfect. Try removing the thinnest one and retighten. If this is two tight, remove the race, apply some blue Loctite to the threads, and adjust the race for optimum bearing performance.

Personally, and this is just my 2 cents worth of advice, a Suntour Perfect is a superior freewheel to an Atom or Maillard 6 speed. This is especially true since the OP reports the bike has been barely ridden. Unless the internals are loaded with corrosion, it should continue to function well for many years to go.
i donít think the suggestion for Atom or Maillard was serious, more a tongue and cheek reference to a previous thread about French bikes...

And SunTour freewheels are ordinarily bomb proof.

i wonder what RD and hub exists on it.
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Old 12-21-21, 01:06 PM
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Originally Posted by jdawginsc View Post
i donít think the suggestion for Atom or Maillard was serious, more a tongue and cheek reference to a previous thread about French bikes...

And SunTour freewheels are ordinarily bomb proof.

i wonder what RD and hub exists on it.
The rear derailleur is a Suntour XC and the hub is a Suntour Cyclone with sealed bearings
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Old 12-21-21, 02:49 PM
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Originally Posted by squirtdad View Post
you could go for an IRD

$70 new, 13-32

https://www.interlocracing.com/shop/...arch=freewheel
Do you know of the current opinion on these? I know IRD has had problems in the past. I sure wouldn't mind having one of those 7spds for my Ross Mt Hood.

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Old 12-21-21, 03:04 PM
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Originally Posted by thook View Post
Do you know of the current opinion on these? I know IRD has problems in the past. I sure wouldn't mind having one of those 7spds for my Ross Mt Hood.
my understanding is this is a redesign from the previous ones that had problems

here is recentish thread This is good...IRD freewheels are back on the market again.

and there is always the bit ugly, not as nicely finished as they used to be (made in china difference) shimano for $14 https://www.rivbike.com/products/fre...hg37-7sp-13-28
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Old 12-21-21, 03:53 PM
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Originally Posted by robertj298 View Post
The rear derailleur is a Suntour XC and the hub is a Suntour Cyclone with sealed bearings
A 7 speed should be able to fit on there if it is a newer Cyclone (126 OLD), I would think? If so, a Suntour 7 speed would work well. I am guessing they are:
https://velobase.com/ViewComponent.a...c3715&Enum=110

Did any other generation of Cyclone have hubs?

However, is the rear derailleur an XC, XCD, XC Pro, XC-1? They all have their quirks, though shifting in friction mode, cannot really imagine an issue. On the long-cage XC, 38 chain wrap, so you are probably cutting it close if you went 14-32.
SunTour 7 13-26 https://www.ebay.com/itm/19461711397...4AAOSwsHVhsMTw
SunTour Alpha 7 speed https://www.ebay.com/itm/18511890853...wAAOSwk3ZhcJX3

I'm wondering if you could get it to index with the second one?
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