This will revolutionise shifting... or not...

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[XAP]Bob
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This will revolutionise shifting... or not...

Postby [XAP]Bob » 21 Oct 2020, 3:31pm

https://www.ebay.co.uk/itm/114474737182

Rollers are great in various places, but I can't say I've ever really wanted the last turn of a derailleur cable to have a not insubstantial mass attached, ready to bounce in at the spokes...
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fastpedaller
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Re: This will revolutionise shifting... or not...

Postby fastpedaller » 21 Oct 2020, 3:34pm

Could fit one at every cable bend :lol:

hamster
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Re: This will revolutionise shifting... or not...

Postby hamster » 21 Oct 2020, 3:38pm

And solved more effectively 25 years ago by the Cog Hog. :?

Bonefishblues
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Re: This will revolutionise shifting... or not...

Postby Bonefishblues » 21 Oct 2020, 3:39pm

Cog Hog did it first (and was moderately effective with Gripshift)

rmurphy195
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Re: This will revolutionise shifting... or not...

Postby rmurphy195 » 21 Oct 2020, 5:21pm

Wow! An accident waiting to happen.
Be interesting to see if they respond to my query ""Isn't this likely to flap about and jam in the spokes?" ...

A prompt response received thus :

"Thankyou for your enquiry. The Gizmo weighs only 34 grams and the outer gear cable is quite stiff so it does not flap around. It has been thoroughly tested and works well with nice crisp smooth gear changes.
Regards Simon Ogden"
Last edited by rmurphy195 on 22 Oct 2020, 9:20am, edited 1 time in total.
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hamster
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Re: This will revolutionise shifting... or not...

Postby hamster » 21 Oct 2020, 5:55pm

Bonefishblues wrote:Cog Hog did it first (and was moderately effective with Gripshift)


Made all the difference on my tandem with a Shimano 7 speed setup.

peetee
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Re: This will revolutionise shifting... or not...

Postby peetee » 21 Oct 2020, 6:04pm

“Remove a sharp bend” ... with an even sharper one :lol: :lol:
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NATURAL ANKLING
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Re: This will revolutionise shifting... or not...

Postby NATURAL ANKLING » 21 Oct 2020, 7:45pm

Hi,
Shimano have used this idea on several of their derailleurs in the past.
The wheel / pulley is incorporated into the derailleur.
I have one on one of my bikes.
It removes the friction in the cable doing that last turn.
Not sure the last time shimano used it?
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gxaustin
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Re: This will revolutionise shifting... or not...

Postby gxaustin » 21 Oct 2020, 9:44pm

Great oppotunity to collect road dirt

scottg
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Re: This will revolutionise shifting... or not...

Postby scottg » 21 Oct 2020, 11:15pm

Every thing new is old again, or something.


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Redvee
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Re: This will revolutionise shifting... or not...

Postby Redvee » 22 Oct 2020, 1:02am

Bonefishblues wrote:Cog Hog did it first (and was moderately effective with Gripshift)


Cog Hog's slao worked well with v-brakes removing the noodle, better used on the rear to reduce the profile of the brake if heels wewre catching on the brake outer. IIRC you had to file the cog hog down a little for it to fit in the brake arm.

Brucey
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Re: This will revolutionise shifting... or not...

Postby Brucey » 22 Oct 2020, 3:33am

the ebay cable roller will be at least 2" from the spokes and the chances of it getting snarled up I would say are slight. Not my cup of tea ( I think dirt will get into the cable too easily) but at least it isn't going off at half-cock (half-cog...?). It always seemed to me that it was a bit daft having a 180 degree cable bend and bothering to have a roller (cog hog, rollamajig) that only did about half of it...? A 180 degree roller makes more sense.

The cable will also flex and fatigue around the roller, but this is no worse than the flexing that goes on in the shifter and near the pinch bolt.

cheers
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Shreds
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Re: This will revolutionise shifting... or not...

Postby Shreds » 22 Oct 2020, 4:07am

Pointless addition.

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Mick F
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Re: This will revolutionise shifting... or not...

Postby Mick F » 22 Oct 2020, 8:50am

This will revolutionise shifting... or not...

Not.
Mick F. Cornwall

sun ra
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Re: This will revolutionise shifting... or not...

Postby sun ra » 22 Oct 2020, 9:35am

I’ve fitted an avid rolla-majig to my cyclocross bike a few weeks after first building it up (11 speed Campag pre-2015). On my set up shifting is definitely smoother with the gizmo than without. On said cyclocross frame the rear mech cable is routed along the seat stay.