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126mm between dropouts..possible to fit 7 or 8 speed.

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126mm between dropouts..possible to fit 7 or 8 speed.

Old 11-28-14, 12:37 AM
  #1  
tudorowen1
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126mm between dropouts..possible to fit 7 or 8 speed.

I have an old Ridgeback Rendezvous..an old Dahon clone folding bike made in Macao ..a decent bike with hi tensile frame.I have a 14 to 34 6 speed megadrive freewheel fitted..Is it feasible to get in a 7 or 8 speed 130mm wheel into the frame for a better gear range..
Like to keep the bike because they are well made but simple bikes..

The seatstays and chainstays are only about 12 inches long after the brake bridge and I wonder if they are too short to cold set..
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Old 11-28-14, 08:36 AM
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unterhausen
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is it steel? You might have chainline problems
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Old 11-28-14, 09:24 PM
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tudorowen1
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Yes it is steel ..Any chainline problems could be sorted out by a longer bottom bracket surely..
I am only talking about 3mm or so either side ..
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Old 11-29-14, 01:10 AM
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I think Unterhausen is referring to the chain angle. As the freewheel gets wider, the chain leaves the front chainring at wider angle which may cause front derailment. Short chainstays make this worse. I don't know the width difference between a 6sp and 8sp set up but, it seems like it's a small change and you could probably get outer and inner chainring guides like the CX folks use to keep it in place. It might (same word Unterhausen used!) make grindy noises though.

Good luck!
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Old 11-29-14, 01:30 AM
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8 speed (road) requires a 130mm spacing, if the frame is steel and is currently 126 it could be cold set to 130mm... this is a change of 2 mm on each side which should not have too profound an effect on the chain line.
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Old 11-29-14, 01:37 AM
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Building a 7-speed cassette wheel is a possibility with good used parts, and then you'd have the option of a 13-15-17-20-24-29-34 "K" or 14-16-18-21-24-28-32 "F" cassette to spread the gears out better in your 126mm spacing.
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Old 12-21-14, 10:38 PM
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I run 130mm hubs in 126mm frames all the time. I don't even bother to cold set. Just spread the stays a bit when putting the rear wheel on.
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Old 12-22-14, 01:18 PM
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Why 8?. the only gear they offer extra is a 12 instead of a 13t. a 7 speed freewheel will fit in place of the Regular 6 speed just Fine.

think Gear Ratios count teeth and decide if that extra Cog even Matters. 'speeds ' is just short for how many Cogs on the Hub.

30 years of cycling on those, and my derailleur Bikes with 6 and 7 speed _ by 3 on the crank, drivetrains still work just Fine .
[A 50:14 high and a 24:34 low with 700c, 35 tires works ]

For Decades of Touring, internationally, And JRA cycling..

Mega range is a 24t next to a 34t be it 6 or 7 .. perhaps a 7 speed with the last 3 being 24,28,34 will be more satisfactory.

Last edited by fietsbob; 12-22-14 at 01:27 PM.
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Old 01-02-15, 07:15 AM
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Originally Posted by ppg677 View Post
I run 130mm hubs in 126mm frames all the time. I don't even bother to cold set. Just spread the stays a bit when putting the rear wheel on.
Same here. Don't bother with the cold set.
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