truvativ hammerschmidt

[Tumbleweed]

anyone read anything about the sram/truvativ hammerschmidt front "derailleur"? looks weird. like a fly reel with a crank stuck on it. gimmick or the next big thing? holy roller2008-09-15 12:22:40

[Racer X]

I don't reckon the front derailleur will be replaced soon, I mean the Rolhf, Spelling, has never really taken off.

Racer X2008-09-15 12:10:36

[shaunh]

Schmidt not Schidt!!

 

Here is a review. http://www.pinkbike.com/news/Truvativ-HammerSchmidt-Preview-2008.html

[Tumbleweed]

there's an article in the latest bike mag with a q&a with a sram deigner. maybe it's marketing bumpf, but there are a coupla benefits to it.

[shaunh]

The major benefit seems to be clearance.

[Tumbleweed]

Schmidt not Schidt!!

 

?

 

Here is a review. http://www.pinkbike.com/news/Truvativ-HammerSchmidt-Preview-2008.html

 

 

 

misspelled in the heading, but not the post. will edit shortly

[Hog_]

Interesting system. It looks Schidt expensive though!

 

I like the idea of a gearbox-type shifting system. Advantages such as gearing while coasting would help in a lot of situations. The chain/d?railleur/cassette/chain ring system has been used for ages now. Surely the technology can be improved upon?

 

 

 

[GoLefty!!]

This is the future. Hammerschmidt is the SRAM's system. Schlumphf also have a system as does Nicolai with their B-Boxx. Shimano is next.

 

Then next year is the new SRAM 9s internal gear hub and for all mountain it's bye bye derailleurs at the top end of the market. By 2013 we'll all be on gearbox bikes. Embrace it brothers

[Azonic]

This will be the next big thing, definitely. As is that system adds maybe 100g over a comparable crankset and derailleur. Give it carbon crankarms and titanium bits on the inside and it will be pimping light even for XC racing.

[Tumbleweed]

one of the benefits, as i read in bike, was that it opens up the design of bikes. designers can forgo having any sort of post to mount the front derailleur. the sram engineer also pointed out that it increases clearance, has a chain guide, and can be combined with a shorter chain and smaller rear derallieur cages.

[Dirtbreath]

I'm sure it's been posted here before but there is also the Nuvinci drivetrain.

 

 

Very unique. I want one of these.

[Red Zone]

Its got a bashguard made of Carbon or ultra durable plastic, not so sure about that one.

[parabola]

 

I think that a major benefit is the instant shift times, as the gears are constantly meshed in a planetary gearbox, and the gear selection is done by merely locking different parts of the gear system. These kinds of gearing systems can give a huge speed selection without having a different sprocket for each speed. The chain does not move at all relative to the frame, which itself could lead to simpler and lighter bikes, as there can be less clearance between frame and chain.

EDIT - its like having all the benefits of a single speed but with the flexibility of a variable speed transmission.

 

An enclosed housing comes with real advantages on a machine used outdoors, most obviously they require less maintenance and will increase sprocket/chain life. The disadvantage is that they are usually complicated to service and do not lend themselves to trail side repairs.

 

This is probably where I see bike transmission designs going in the future, with internal hub transmissions becoming the norm on the rear. But its going to take a while for the technology to develop to the point where it is both reliable and accessible.

 

parabola2008-09-16 14:35:01

[GoLefty!!]

IT IS RELIABLE, its just not affordable to the masses yet...