On Monday, 9 September 2019 21:59:55 UTC-4, Ralph Barone wrote:
AK wrote:
On Monday, September 9, 2019 at 7:45:43 PM UTC-5, Sir Ridesalot wrote:
On Monday, 9 September 2019 12:04:07 UTC-4, AK wrote:
On Monday, September 9, 2019 at 1:38:53 AM UTC-5, Chalo wrote:
6 speed freewheel and 8 speed shifter/derailleur are never compatible.
7 and 8 speed are compatible with Campagnolo parts, but for the love
of God don't do that.

7 speed Shimano pattern freewheel or cassette and 8 speed Shimano
pattern shifting are not compatible, but can be coerced to kinda-sorta
work poorly together. There's a 0.2mm difference in gear intervals
that stacks up to 1.2mm discrepancy across the extremes. It's likely to make noise.

Thanks for the info. So what do I need?

Andy

What you need to shift a SIX speed INDEX cassette or freewheel is a SIX
speed INDEX shifter.

Was your original shifter (the one that was replaced) a SIX speed INDEX
shifter? If it was a FRICTION shifter then the 8-speed shifter should
work IF it has a FRICTION MODE on it besides index.

Cheers


I talked to the bike shop owner. He will replace the 6 speed freewheel
with a new 7 speed at no additional charge.

So I guess I will have 3 more gears. :-)

Andy
7 speed


And if the text upthread is correct, your shifting will still be screwed up
because you will be using an 8 speed shifter with a 7 speed cassette.

Not necessarily. I have a 7-speed cassette that's being shifted with a SRAM 8-speed twist-grip shifter with no problem at all. I did adjust the gears by using the middle cog on the cassette though as that minimizes the differences over the entire range. It works fine though.

Cheers