[dropmachine]

How sweet would that double-cassette system be if you used SRAM RED cassettes....so light.

 

[ONTHELEVEL]

its an OK design, but IMO this guy has it beat to take out the der forever. he beat me to it, by a long ways. its a great design for sure.

http://www.bikeradar.com/news/article/first-look-phaser-gearbox-7389

Does that work on a twist style shifter?

 

[Whoops]

Meh, old news for sure.

there's a guys around here who's gone one better and built the rear brake into it all.... an on board rear brake to REALLY reduce unsprung weight.

Shame Honda's out, but great to have had them involved at all.

 

[bizutch]

So what happened to the Petespeed project?

 

[Pegboy]

Meh, old news for sure.

there's a guys around here who's gone one better and built the rear brake into it all.... an on board rear brake to REALLY reduce unsprung weight.

Shame Honda's out, but great to have had them involved at all.

Brakes in a box...doesn't sound like it would cool very well.

 

[deadatbirth]

no, i am working with the alfine hub this year. its "availible", uses a
triger shifter, no DHer wants a grip shift. and affordable. that is THE
only way we will start to see the masses use gearbox's

uhh..i want a grip shift. i think though i might be the only one using it.
i havent stopped using grip shift since '96 and wont change

 

[Huck Banzai]

uhh..i want a grip shift. i think though i might be the only one using it.
i havent stopped using grip shift since '96 and wont change

Well then, you must be evil, and therefore we must now disdain you and your twist shifting ways.

(Really - whats up with that? Do you have Biopace rings too?)

 

[deadatbirth]

Well then, you must be evil, and therefore we must now disdain you and your twist shifting ways.

(Really - whats up with that? Do you have Biopace rings too?)

haha. i wish i still had some Biopace stuff, that stuff is a classic f-up design.
but i honestly just love the way gripshift rides and works. i have had ZERO issues with it shifting while riding or mistakingly shifting. i just never got used to riding rapid fire or thumb triggers.
i mean its the same way with everyone else too...if you never got used to it then you wouldnt like it.
i can down shift or upshift as much as i need to with no issue.
every bike ive had since '96, which is at least 15 bikes, has had gripshift and i dont plan on using anything else.

 

[xy9ine]

i'm stuck with gripshifting with my rohloff, and despite preconceived disdain on principle, i've warmed up to it. bombproof & easy to dump lots of gears quickly. kind of a non-issue once you're used to it. (though if there was a trigger out there, i'd probably be running one).

 

[deadatbirth]

(though if there was a trigger out there, i'd probably be running one).

trader

 

[dropmachine]

Trader? Trade for what?

I'll give you a bob ross painting for a pete speed system.

 

[jonKranked]

uhh..i want a grip shift. i think though i might be the only one using it.
i havent stopped using grip shift since '96 and wont change

yea well, you're also a spaz. keep your gripsh!ts you wanker.

 

[SPINTECK]

uhh..i want a grip shift. i think though i might be the only one using it.
i havent stopped using grip shift since '96 and wont change

I still like grip shift because you can keep your thumbs on the bar as you shift. The problem is most of my DH rigs came with thumb and I'm too cheap and lazy to switch them back to grip.

 

[no skid marks]

I'm totally happy with the twit shift now,I wouldn't change to a trigger now I don't think. The twit shifter is better for multiple gear changes. It really is such a moot point IMO,it's just a shifter.Weight and reliability matter more as far as gearboxs go. i have thought of trying a Sram twit shifter on my other bikes also. 1-1 would have to be as crisp as the Rohloffs.
Anyone know what's happening with the Italian job?
Anyone tried the Alfine Shimanno hub yet? How heavy is it?

 

[EVRAC]

Anyone tried the Alfine Shimanno hub yet? How heavy is it?

I've got one on my commuter. Sees daily action in all weather. 24km each way. So far (6 months?) it's been AWESOME. Perfect shifts, quiet, maintenance free. Weight is around 1500g, I think. It's on shimano website.

Go BCD! Bring back the Nexus/Vite/Alfine!

 

[deadatbirth]

Trader? Trade for what?

I'll give you a bob ross painting for a pete speed system.

yeah i think i mighta meant traitor...i done gone and f-ed up

 

[deadatbirth]

yea well, you're also a spaz. keep your gripsh!ts you wanker.

dirty cali hippie

 

[ÆX]

yea, i was thinking about 3rd chain to speed up the cassette for shifting. but it seems like its not needed from honda.

alfine, is that a shimano gearbox? and trigger shifter? wow, i didn't know about that.

could you post some pics of your prototype? was it used on a bike too?

alfine is shimano rear 8 speed hub. it has the effective range of a
12-38 with the use of a 20t sprocket. i have a 16 input so its output
will be more like a effective 10-30, that enables me to run a 34t at
the cranks for clearance and still get an over all ratio of 3.4-1 the
same as a 38-11.



i have no pics of what i was working on. it never got on a bike
desk model only.

 

[ÆX]

Go BCD! Bring back the Nexus/Vite/Alfine!

working on it. should be a rad bike.

 

[EVRAC]

alfine is shimano rear 8 speed hub. it has the effective range of a
12-38 with the use of a 20t sprocket. i have a 16 input so its output
will be more like a effective 10-30, that enables me to run a 34t at
the cranks for clearance and still get an over all ratio of 3.4-1 the
same as a 38-11.

The cool Alfine-specific cogs with the built-in plastic chain guides are only available in 18 or 20 tooth. They also have a little offset and do not have the same chainline as a flat cog.

 

[ÆX]

The cool Alfine-specific cogs with the built-in plastic chain guides are only available in 18 or 20 tooth. They also have a little offset and do not have the same chainline as a flat cog.

i have a 16 from a nexus i am guessing is the same spline. its offset
too. i should not need the guide with no tensioner. 16 is important to
me. its gained ground clearance and doesn't load the hub with a 1-1
to the rear.

 

[EVRAC]

i have a 16 from a nexus i am guessing is the same spline. its offset
too. i should not need the guide with no tensioner. 16 is important to
me. its gained ground clearance and doesn't load the hub with a 1-1
to the rear.

Yep, same spline. That should work. How are you going to tension the primary chain? I'm not sure about the sliding bolt-in bb setup you were drawing. KISS. Maybe just an adjustable pulley, or use SRS/LG boomerang rotated around until it tensions the chain.

 

[ÆX]

Yep, same spline. That should work. How are you going to tension the primary chain? I'm not sure about the sliding bolt-in bb setup you were drawing. KISS. Maybe just an adjustable pulley, or use SRS/LG boomerang rotated around until it tensions the chain.

sliding BB that allows 1/4 at a time bb height adj
that doesn't effect geometry is a BIG plus. i don't
think it will be that complicated. should be simple
and worth doing to get a double for it. anytime
you use pulleys and tensioners there can be errors
incurred from improper setup and or malfunction
that would cause a chain to come off. that is why
i like concentric pivots.