Joined: May 2008
Posts: 10,106
Likes: 2,762
From: Fredericksburg, Va
Bikes: ? Proteous, '65 Frejus TDF, '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '89 Pinarello Montello, 'Litespeed Catalyst'94 Burley Duet, 97 Specialized RockHopper, 2010 Langster
SS Freewheel with jumping chain
Due to a lack of a FW/FG hub, I dished a rim and moved spacers to use a road hub to mount a SS freewheel.
I did the appropriate chain line measurements to ensure good chain line.
When the crank is rotated backward, periodically there is a jump in the chain. Upon inspection of engagement between the chain and the sprocket, the alignment looks good, the ramp on the tooth looks fine and the chain does not have any resistance to rotating on all the pins, but the chain tends to ride up the tooth and then pop down.
1/8" chain, sprocket and ring.
What did I miss? I spaced the freewheel further towards the DO but didn't notice any significant difference. Used digital calipers to measure from the centerline of the bike to the center of the teeth, they measure within 2-3 mm between the ring and the sprocket.
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