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Suntour GPX Freewheel took a dump, options?

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Suntour GPX Freewheel took a dump, options?

Old 02-04-11, 12:54 PM
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thenomad
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Suntour GPX Freewheel took a dump, options?

A coworker who is now commuting in picked up an Allez with GPX. The freewheel just died. I know the Suntour spacing is funky but a high dollar replacement is unlikely.

Are there any issues with the threading of the Suntour hubs? Can I get a Shimano FW on there and just switch it to friction? I see JensonUSA has some 7 speed Falcon HG for $15. That seems a decent option to get him on the road?
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Old 02-04-11, 01:46 PM
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Darn near any old fw will work, and ANY new one will, since they're all Brit threads nowadays. May need to switch to friction shifting, tho', as Suntour's indexing was ahem "unique" (as in proprietary spacing, incompatible with anything else).

SP
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Bend, OR
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Old 02-04-11, 01:57 PM
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Yeah, that's what i thought, just wanted to be sure the threads would be fine.
The friction option is the best one so far. He'll probably leave it in one or two gears.
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Old 02-04-11, 02:13 PM
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Hey - I have used this 6 speed freewheel on the Suntour 7 speed shifters without any problems - They also make a seven speed but I am not sure it matches up - I have to admit the 34 tooth gear has increased my ability to enjoy my rides as I get older...

Shimano 14-34 Thread-on 6-speed Freewheel "Megarange" ($19.95 at Harris)
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Old 02-04-11, 04:00 PM
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Keep in mind that if you decide to go with a larger low gear, that your derailleur needs to be able to handle it....... Not all derailleurs can handle more than 28 and surely not 34.
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Old 02-04-11, 06:19 PM
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Are you sure the old freewheel is toast? SunTour freewheels are notoriously robust. Have you tried shooting it full of lubricant to loosen what may just be stuck pawls?
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Old 02-05-11, 12:14 AM
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Originally Posted by ctmullins View Post
Are you sure the old freewheel is toast? SunTour freewheels are notoriously robust. Have you tried shooting it full of lubricant to loosen what may just be stuck pawls?
+1
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Old 02-05-11, 08:45 AM
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The freewheel gears started moving in and out on the freewheel hub. The retainer ring had undone while he was riding. I tried to get it all back together at work with no tools but it was still shifting in and out. I think some tiny parts must have been puked out. The pawls work so I was able to get him home by wrapping cord around the back of the FW by the spokes to keep the gears from moving side to side.
Instead of fixing it he was riding it again so I guess I'll take the lead on the fix before he strands himself.
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Old 02-05-11, 08:49 AM
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If 6-speed indexed, the proper replacement is a 4-prong Suntour freewheel, but I've had notable success using a pre-indexing, two-prong 6-speed Suntour FW with a Shimano chain; the combo works well with an Accushift 6-speed.

If 7-speed, stick with a 7-speed Accushift-era Suntour freewheel. If necessary, get a replacement freewheel body on eBay, spin the cogs off the original freewheel, and transplant them onto the new body.

-Kurt
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