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Truvativ HammerSchmidt
NB: Originally posted elsewhere on the Global Riders Network and appears via syndication.
Has anybody used these, thought opinions and can they be fitted to Specialized enduros or pivot 5.7
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I believe all you need to run it is ISCG tabs.
I run one on one of my bikes, it’s the AM version. There is a FR version which is quite beefier and heavier. I find it great, shorter chain, no chain slap, with a short rear derailer it would be close to the perfect setup. I run a x10 so effectively its 2 x 10 setup. It comes with two front rings you can choose from 22 & 24. The current bike that it’s mounted on didn’t have a ISCG tab so I had an adaptor grafted to the frame. The only thing that could be considered annoying is when the Hammy is in overdrive it does produce a weird whine which apparently is normal. Also backward pedalling in overdrive there is quite a load clicking, which is pretty cool when approaching slower riders, pedestrians etc. Peddle backwards and they hear you coming. It’s pretty trick to be able to change from 1.1 and 1.6 ratio moving forward, backward, sitting still and then just peddle straight on with zero hesitation in the drive train. The actuator is back the front to what you would be used to but after about 3 rides you’ll be over it . I have never done any weight comparisons but I would assume it would be a tad heaver than a normal set up. Depending on the type of riding you do it could be one of those items that you just keep and change from bike to bike. If you’re an XC racer obviously not the right choice. There is also a specific bottom bracket that you have to use as well. Downside I guess is the price, frightfully expensive. I picked mine up in Canada second hand off a demo bike. Not sure about the Pivot, but the Enduro is a goer
I did a tiny bit of research, just to know what they are about.
Things that put me off.
-Apparently inefficient in taller? gears.
-Doesn't work well with suspension designs that use chain tension to tighten the rear (DW link). On the Ibis they like a ~34-36t front ring.
-Expensive.
-No point for my riding. Using a 1x: 32 x 11-36, I find I have all the gears I need in a cheap(ish), light, reliable and user serviceable package. Using a Saint RD with a really short cage and Shadow+, I don't get any chain slap, and have never dropped a chain despite not using a chain tensioner.
Never noticed any issues in taller gears
*They cant be fit to an Ibis, No ISCG tabs and not to many people will try and graft one to a carbon frame. Ibis also says that it will introduce to much peddle bob.
*Some frames just are not suited, well I guess mine was one of them until I got the ISCG tab fit and now it's sweet
*Expensive yes
*Personal preference yes
*Inovative trick bit of gear yes
It's sorta in the same category as a dropper seat post, is it necessary, no, but their cool to have and are functional
One came on my Rallon. I never use granny on my normal loops so I had to have the hammer in the taller ratio. In this ratio, I felt a noticable drag in the pedalling. On top of this, the weight penalty was quite large. It was like 600g heavier for the hammers over a set of XTs with a widg (If I recall correctly). For these two reasons I didn't like them and they were promptly removed from my bike. On the other hand, I have a mate that runs one and he loves it.
How was the Rallon, they look alright?. Yeah weight wise heavier, the weight is down low and don’t I notice it with the type of riding I do. I wouldn’t imagine they would be good for xc loop type at stuff. They’re in their element in climbing to the top, then coming down really snotty rocky stuff, over logs and up rock steps either slow or fast.
The Rallon is awesome! Had it over a year now and freakin love i every day I ride it!
Yeah, the other great thing about the Hammers is it's clearance. Due to the super small chainring (as stated above 22 or 24), the casing of the cranks isn't much bigger, so hoping over trees and clearancing stuff, is pretty hard to beat.