nice idea but i do worry about the durability... could you imagine how it would work once covered in the sort of gloopy mud we get over here in the uk?? i cant see those pawls going back into their housing once theres our mud behind them!
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I love Oranges... Made in The Fax... Ridden in the Fax
sorry, i've missed the last 5 pages of this..... (yes i know, i'll read it later!)
so what we're basically saying is SRAM have built a sturmey archer hub system in to a crank. Good idea, not quite an 'innovation' though. As for their website saying it's a revolution, hasn't some other german company been doing this for ages? I remember seeing something similar a while ago.
nice idea but i do worry about the durability... could you imagine how it would work once covered in the sort of gloopy mud we get over here in the uk?? i cant see those pawls going back into their housing once theres our mud behind them!
Your rear freehub has been fine, hasn't it?
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Rides: DH - SC Bullit.2/Totems/Hopes. XC - SC Heckler/Pikes(Push)/XTs. Road - Kaffenback. Ride fast, take chances. Just don't blame me when you fall off.
true but thats ll sealed off quite tightly! from watching the video of them instaling it there seems like very little protection from that kind of thing. it looks like there is a fair sized gap that mud can get in through and get into the moving parts. i might be wrong but it appears like that from the video!
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I love Oranges... Made in The Fax... Ridden in the Fax
I think for that sort of range in something of that size you're looking at something quite weak. Not quite the innovation I was expecting from SRAM though.
I agree Jim. There's a full article in the latest MBR. They say they can feel the efficiency loss in the granny gear. When they asked SRAM what the efficiency loss was, they said they didn't know - they haven't tested it. Haa, yeah right! Efficiency would be one of the first things you'd test for! And SRAM tests everything. So I'm sure the efficiency is worse than a chain...and heavier as well. Shame, because it's got everything else going for it... Good start I guess.
Amazing how difficult it's been for the world's best engineers to beat the chain / derailler setup...
Shame, because it's got everything else going for it... Good start I guess.
Amazing how difficult it's been for the world's best engineers to beat the chain / derailler setup...
I'd love to know the justification for it weight-wise, thats gotta be putting some beef onto the drivetrain...
As said before, British elements + precision tooth gearing + not looking very sealed. Not convinced, especially with the already shocking standards of ham fistedness and bodging we already see on here. For that money I'd just shell out for a Rohloff.
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According to MBR, compared to a typical all mountain set up, the Hammerschmidt is +170g. Compared to a typical FR setup, the Hammerschmidt is +20g.
That is using their Truvative Hussefelt and Stylo cranks as the benchmark. Husseys are pretty heavy I think. So I reckon those figures are optimistic...
Have just done some research. Chain drive efficiency is around 98%. Most geared hubs are around 93-95% efficiency. A 3-6% loss is pretty significant. That would only affect the Hammerschmidt in the lower gear though (when climbing).
it has a massive eccentric bearing in it, i used to have a GT i drive with one of those and they don't like the mud. Nor are (were) they easy to get hold of.
I'm not convinced at all, although if it was shimano i'd have a little more hope for it.
Shimano pull the strings on bike transmissions, if they don't want to play with gearboxes or systems like this, it won't ever be mainstream, in my opinion.
.... Shimano pull the strings on bike transmissions, if they .....
10 years ago maybe you would be right. There are several shimano 'features' that would never have happened if SRAM didnt scare the crap out of them by using common sense in there designs. Shimano obviously have a huge influence over the market, but they dont have the monopoly they once had.
Anyway back on topic. I'm not sure about this really. I think the idea is sound for AM/light FR riding, but I think a lot of development will be needed before they will beat the current setup for reliability and certainly for price.
I think it looks a bit too... clever and almost a waste. At present I can't see it as being any advantage over a simple dual-ring set up with an E13. I'm saying this because it bares extra weight (and takes a lot out of your wallet)and will have efficiency problems. BUT...
...It's all part of the evolution. I think everyone on here will admit that at some point the chainring/derailier set up will go. A chunk of metal doing little more than pushing and pulling the chain has its obvious flaws.
I doubt that the HammerSchmidt itself will be terribly successful, but it may lead to more interesting and innovative designs which is, after all, what we want. It's another step towards internal, compact gearing and a good looking piece of engineering.
from pinkbike - "If you want to use the HammerSchmidt, your bike will need ISCG 03 or ISCG 05 tabs. ISCG adaptors will not work. This means this system is not compatible with many top end bikes, but Truvativ reassured us that they are working closely with many of these manufacturers to have them incorporate ISCG table on their frames so they are ready to adapt to the HammerSchmidt"
seems quite short sighted to me! heres a new product that will 'revolutionize' the industry... but half of you cant use it unless you buy new bikes... so our market is now only 50% of what it could be!! Truvative apear to be missing a trick or two here! Not convinced!
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I love Oranges... Made in The Fax... Ridden in the Fax
To be fair to SRAM, you have to start somewhere. ISCG is a well accepted standard, though not on all bikes. This is another reason for manufacturers to spec ISCG and I'm sure more now will. Kind of like disk brakes.
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Rides: DH - SC Bullit.2/Totems/Hopes. XC - SC Heckler/Pikes(Push)/XTs. Road - Kaffenback. Ride fast, take chances. Just don't blame me when you fall off.
Another thought. My old Heckler was not so good in the granny ring, cos the pivot was too high (middle ring, it was ace). Now on a standard ring setup that wasn't to much to problem 'cos when you were in the granny you tended to be winching your ass up a hill. However, which Hammer Schmitt you'd have granny chain line all the time, which would suck. I can see this being an issue for a lot of bikes. Will manufacturers start making suspension designed for only a 22/24 chainring? That would surely limit the market quite a lot!
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Rides: DH - SC Bullit.2/Totems/Hopes. XC - SC Heckler/Pikes(Push)/XTs. Road - Kaffenback. Ride fast, take chances. Just don't blame me when you fall off.
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