Second on my list of potential issues with retro kit...
I'd been having problems with chainsuck with an M737 chainset for a while but didn't realise until yesterday exactly what was going on. Using an 8-speed SRAM chain and the particular combination of chainrings I was using, it's possible for the chain to get jammed behind the granny ring when shifting down from the middle ring. I had to loosen bolts on the granny ring to free the chain.
The middle ring on my setup doesn't have any ramps or pins, so the chain just drops straight off the side. It appears that there is a large enough gap next to the granny ring for the chain to get jammed in, but that the original Shimano middle ring had ramps and pins long enough to ensure that the chain wouldn't ever drop into this gap. Without the pins (i.e. with many other chainrings) the chain will drop into the gap and jam.
Anyone else encountered the problem?
I'd been having problems with chainsuck with an M737 chainset for a while but didn't realise until yesterday exactly what was going on. Using an 8-speed SRAM chain and the particular combination of chainrings I was using, it's possible for the chain to get jammed behind the granny ring when shifting down from the middle ring. I had to loosen bolts on the granny ring to free the chain.
The middle ring on my setup doesn't have any ramps or pins, so the chain just drops straight off the side. It appears that there is a large enough gap next to the granny ring for the chain to get jammed in, but that the original Shimano middle ring had ramps and pins long enough to ensure that the chain wouldn't ever drop into this gap. Without the pins (i.e. with many other chainrings) the chain will drop into the gap and jam.
Anyone else encountered the problem?