634% 18 speed gear box

Neil Fat man on a bike

This looks interesting...............
................but heavy



http://www.pinion.eu/en/index.html

(translation button top left)

delta5

Does look interesting and has some great advantages over normal gearing, but apart from weight and likely cost, the problem is that it's built into the frame - not something you could fit as an upgrade.
Unless it's a stunningly good mech and is adopted into the frame design of some of the leading makers at a competitive price, I doubt it could challenge something like the Rohloff 500-14 which performs a similar function and can be fitted as an upgrade to practically any existing bike.
That said it's always good to see ongoing dev in bike gearing. Current derailleur design dates from the late 1940's iirc, and with modern materials and processes it should be possible to produce something better- less susceptible to crud & collision - and lighter. It will take a big lateral shift in thinking though, and many years, to supercede a deeply engrained 'standard' like the derailleur system, despite it's weaknesses.

Raymondavalon

From the product FAQ:

In its present form, the P-1, including chainwheel, without cranks weights approx. 2.7 kg.

fuelex

Now what if you had that, a triple on the front and a 10spd cassette on the back?
:shock:

shiggy

fuelex wrote:

Now what if you had that, a triple on the front and a 10spd cassette on the back?
:shock:

It would be REALLY heavy!

The 634% range is more than current MTB triple setups, more than I would need.

cooldad

fuelex wrote:

Now what if you had that, a triple on the front and a 10spd cassette on the back?
:shock:

Somewhere on Sheldon Brown's website he built something with, I think, a triple front, 7 rear, and a 3 speed Sturmey Archer hub, so around 63 ratios in all.

fuelex

I forgot to add Rohloff 14spd hub to my list too, can someone do the maths?

cooldad

fuelex wrote:

I forgot to add Rohloff 14spd hub to my list too, can someone do the maths?

420 - could drive the single speed hippies mad.

pshore

After reading about grumbles of the weight of the Rohloff being all at the back, I was wondering why not have a Rohloff built into the bottom bracket ? This is practically it.

thel33ter

cooldad wrote:

fuelex wrote:

I forgot to add Rohloff 14spd hub to my list too, can someone do the maths?

420 - could drive the single speed hippies mad.

No, 3*18*14 = 756

Or just 18*14 = 252

Not sure where the 420 comes from.

Eyon

think of the argos adverts!

Black and blue steel frame.
756 gears with twist-grip shifters.
Sunrace gears.
Front V-type and rear V-type brakes.
Dual suspension.

The chavs would go nuts

thel33ter

Eyon wrote:

think of the argos adverts!

Black and blue steel frame.
756 gears with twist-grip shifters.
Sunrace gears.
Front V-type and rear V-type brakes.
Dual suspension.

The chavs would go nuts

fuelex

thel33ter wrote:

cooldad wrote:

fuelex wrote:

I forgot to add Rohloff 14spd hub to my list too, can someone do the maths?

420 - could drive the single speed hippies mad.

No, 3*18*14 = 756

Or just 18*14 = 252

Not sure where the 420 comes from.

Yeah, but I want rohloff and a 10spd cassette (and a triple and one of them thingies from the OP!)

thel33ter

Then you will have 7560 gears in total :shock:

But with a quad chainset http://cgi.ebay.co.uk/RARE-THUN-QUAD-4- ... 897wt_1055

and roadie 11 speed...

11088 gears