Sram 3x7

Quoted post said:

Originally posted by Protactical
I have this hub on a new bike.

It feels like "3" is low, "2" is high, and "1" mid position? Is that possible?

Do you have to pedal backwards to make this thing shift?

It should be like this:

1 Low
2 Mid
3 High

I do not know how you could have arrived at the other conclusion. A 3x7 hub should be trouble free for years.

No pedalling backwards are needed.

You have to stop pedaling on the Sachs 3x7. SRAM purchased them a couple of years ago and since came
out with the SRAM Dualdrive. It can change gears under load (while pedaling) or at a complete stop.
I am looking at replacing my Sachs on my greenspeed tandem for the SRAM.

"Protactical" <[email hidden]> wrote in message
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Quoted message said:

I have this hub on a new bike.

It feels like "3" is low, "2" is high, and "1" mid position? Is that

possible?

Quoted message said:

Do you have to pedal backwards to make this thing shift?

"bentcruiser" <[email hidden]> wrote in message
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Quoted message said:

Protactical said:

Quoted message said:

Do you have to pedal backwards to make this thing shift?

It should be like this:

1 Low 2 Mid 3 High

I do not know how you could have arrived hub should be tat the other

conclusion. A 3x7

Quoted message said:

rouble free for years.

No pedalling backwards are needed.

Yes, but I seem to recall, the hubs require you stop pedaling briefly especially when they are under
torque like going up hill. It's been a few years since I've had my BikeE Denny in Sayre, PA

I came to that conclusion when it seemed enormously harder to pedal in the mid position,
consistantly, and as mentioned with the other positions. However, I haven't been pausing it as
others above are suggesting. I'll report back if necesary.

Thanks all

bentcruiser said:

Protactical said:

I have this hub on a new bike. It feels like "3" is low, "2" is high, and "1" mid position? Is
that possible? Do you have to pedal backwards to make this thing shift?

It should be like this:

1 Low 2 Mid 3 High

I do not know how you could have arrived at the other conclusion. A 3x7 hub should be trouble free
for years.

No pedalling backwards are needed.

However, shifter cable length needs to be set correctly for the SRAM/Sachs 3x7 to shift properly.

Tom Sherman - Near the confluence of the Mississippi and Rock Rivers

The mid position is generally a "neutral" position in that it just locks in and keeps the native
gearing of the bicycle. The 1 and 3 position actually change the gearing.

"Protactical" <[email hidden]> wrote in message
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Quoted message said:

I came to that conclusion when it seemed enormously harder to pedal in the mid position,
consistantly, and as mentioned with the other positions. However, I haven't been pausing it as
others above are suggesting. I'll report back if necesary.

Thanks all

OK, since the subject came up, here's my question about the 3x8 hub on my GS GTO. I've read it
somewhere that one can maintain these things by simply turning the trike on it's side and dripping a
few drops of oil in the hole the shifting chain enter. Is that true? What kind of oil? How 'bout the
Prolink I use on my chain? BTW, I generally run in 2 (Mid position) so if I have to stop, I can
simply downshift to 1 until I get up to speed. I understand that 2 is the direct drive with the
least amount of internal friction, too.

BentJay

Do you have the SRAM Dual Drive or the Sachs 3x7? The dual drive doesn't require any maintenance.
They are sealed, etc.
www.sram24.com/techdoc/english/consumers/ghs/pdf/dualdrive/DualDrive_Ins_E_1 2_02.PDF

I don't know on the Sachs 3x7, which is a shame, because that is what I have ;-) I'm upgrading to
the SRAM before too long though.

"BentJay" <[email hidden]> wrote in message
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Quoted message said:

OK, since the subject came up, here's my question about the 3x8 hub on my GS GTO. I've read it
somewhere that one can maintain these things by simply turning the trike on it's side and dripping
a few drops of oil in the hole the shifting chain enter. Is that true? What kind of oil? How 'bout
the Prolink I use on my chain? BTW, I generally run in 2 (Mid position) so if I have to stop, I
can simply downshift to 1 until I get up to speed. I understand that 2 is the direct drive with
the least amount of internal friction, too.

BentJay

iLiad,

I have the 3x8, which is really a 3x7 modified by Ian Sims. BTW, somewhere in my archives he
mentions rebuilding the hub removing the bearing races and substituting plain ball bearings held in
place with grease. I used to rebuild the bearing in my circa 1970's bikes that way. (Use Phil's
Grease.) I wonder if Sims does that to all his GS hubs? In the GTO manual he mentions dripping oil
into the hole where the changing chain screws into the hub. Why are you considering going to the
Dual Drive? (There's a new Shimano hub coming out soon. I'd wait to see what that's about.)

BentJay