Flip-flop == nodavedbk said:Anyone know if you can drop the 120mm O.L.D. on a Surly track hub down to 110mm O.L.D. for a trailer bike frame (BMX)?
davedbk said:Anyone know if you can drop the 120mm O.L.D. on a Surly track hub down to 110mm O.L.D. for a trailer bike frame (BMX)?
The kid needs to do some spinning!
Thanks,
davedbk
Good tip ...baphometcycles said:You could stop the rear cassette from coasting by tying it to the wheel. Try weaving a heavy-weight shoe string or a toe-strap in between the "spokes" of the cassette and the actual wheel spokes. I probably won't work all that well, but try it.
Okay, it's too bad you apparently didn't know how easy it would be to service your Hugi 240 hub in-the-field ... it's true that you don't need tools to work on it.baphometcycles said:I've used this technique on mtn bike rides: when a freehub-body blows out, and the cassette spins freely in both directions, you can't pedal forward anymore. This has happened to older Hugi 240 rear hubs. We've been forced to tie the cassette to the wheel with a toe-clip-strap or else try and "scooter" a bike 20 miles out of the desert.
FYI. There are no pawls, per se, in a Hugi 240 hub ...baphometcycles said:Apparently you didn't know how often the pauls and freehub-body shatter . . .
alfeng said:Flip-flop == no
Single Sided == maybe (well, probably not)
Can you respace the dropouts to 120mm?
baphometcycles said:You could stop the rear cassette from coasting by tying it to the wheel. Try weaving a heavy-weight shoe string or a toe-strap in between the "spokes" of the cassette and the actual wheel spokes.
If your frame is steel, then you just need to use the brute force imparted by your upper body strength -- grab a dropout in each hand ... pull apart with whatever you estimate to be 30 lbs of force ... measure & repeat. DO NOT use any additional leverage than you can supply by your lonesome.davedbk said:Surly tech said it couldn't be done and gave me the same suggestion, respace the dropouts.
What everyone's favourite method for spreading chain stays?
Well, SOMEONE came up with the very clever (IMO) modification of a FRONT DISC HUB whereby he simply bolted the cog-of-choice to the 6-bolt disc mount ...davedbk said:My scanning of the usual online suppliers revealed no fixed gear threaded bmx hubs. Do you know of any?
davedbk said:Thanks for the suggestion. How many miles do you get out of a shoestring?
I shall leave my findings, unless it last so long I forget all about this thread.
Okay, so now we know that the STRING THEORY isn't viable ...davedbk said:I first tried 15lb fishing line. My son (70lb) got on. He got off. He got on and it snapped. Not 1 metre. (He stands on the pedal to swing his other leg over.)
alfeng said:Okay, so now we know that the STRING THEORY isn't viable ...
Again, using an English threaded BB lockring with a Track Cog is a commonly used method to go Fixie & is certainly easy enough to implement ... remember to use a Washer to "lock" the lockring ...
BTW. The common suggestion is to use Loctite or Solder(!?!), but I think a Washer would be a better choice.If you don't want to cut a Washer from a detergent bottle, then you can certainly use as BB spacer.
I suggest you use the plastic from the jug portion ...davedbk said:I've got the BB lockring.
Re. the washer - are you saying cut a disc from the side of a detergent bottle or from the base of the lid? i.e. 0.5mm thick disc or 2mm thick ring?
HMmmm. If there is an integrated shoulder which makes the cog 5mm thick, then it should probably be on the spoke side UNLESS you can mount it shoulder side out and not have the chain grind against the spokes ... that is, you would want to mount a spare cassette cog spacer (as an example) on the hub before you thread the cog on the hub if you wanted to mount the cog with the shoulder side on the outside.davedbk said:re the track sprocket...
I bought a 13T - I want my son to do some spinning, not a whole heap.
It has a shoulder on one side. I imagine you install the sprocket with the shoulder on whichever side gives you the best chainline.... or is there a regular side?
I hope it isn't critcal because the BB lockring is 45.9mm in diameter versus the sprocket valley diameter being approx. 45.1mm. If the BB lockring sits against the flat side of the sprocket (with thin washer between) the chain sideplates will hit the BB lockring.
So... is it critical which way the track sprocket installed?
I don't know ...davedbk said:... but my Roselli track sprocket is 8.something mm wide (about 11/32"), leaving me with two threads for the BB lockring and washer - not enough. (it is afterall a cheap non-forged alloy hub).
What is the normal width of a 13 - 14 tooth track sprocket?
davedbk said:....progress update
I had the freewheel removed free of charge - thankyou Elite Cycles Perth - and threaded on the track sprocket. The chain clears the spokes when the teeth are on the inside (shoulder outside). That is good news.
... but my Roselli track sprocket is 8.something mm wide (about 11/32"), leaving me with two threads for the BB lockring and washer - not enough. (it is afterall a cheap non-forged alloy hub).
What is the normal width of a 13 - 14 tooth track sprocket?
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