Gejat van : http://forums.mtbr.com/showthread.php?p ... post552300
I had dollarmania, still do, had to spend the few Euro"s on my account as Dollars as long as it was at 1.30+.
So I ordered two Rollenlagers. Had to pay $10 for international shipping although the website just said the basic local $5, which sorta disappointed me as I ordered 2 in once, they were not going to lose money on me for sure. Package in the end said $7.55 via USPS. O well, they packed it nicely.
Springless chain tensioners for geared frames.
The quality by far exceeded my expectations. The way it attaches to the bike, and the spacers provided look to create an absolutely bombproof whole. The roller rolls, 100% noise free, zero zero zero zero play thanks the the widely spaced bearings. I just played around with a chain, and the noise of it running over the roller was really minute and nice.
I"m not going to use the Pacer for some time it seems, but my girlfriends want here rigid parts MTB she uses for commuting to be converted. She asked me to, really. Her commuting mileage is already kick-azz for a lady, especially in winter (15mi single way, most often 2 or 3 times per week).. 44-18 should make her commutes much less hassle, she never shifts anyway, unless the derailer or 18t cog start working up.
This is exactly what I got in duplo, except for the paper (once).

The tiny stickers are nice, which they"d give a stack of those with each order.
Only thing I"m a bit worried about, is the axle-derailerhanger distance. The Rollenlager (RL) does allow for some play, but I"m afraid it won"t even work for the roadbike I actually got it for. Hope I won"t have to customize it for that use. Not all hangers are as long, as far as I know. I remember to have heard this is part of the reason why road derailers work so well on MTB"s, they"re hanging lower than they were designed for. Sure hope I won"t have to, but a dremel job and wider ring under the "derailer bolt" should do the trick.
My 9spd chain had some 3mm of room over the roller, so a spacerjob on a cassette body should be a breeeze. I"m much less sure about SSpecific hubs (I do own a Surly wheel) . Do all Sspecific hubs share chainlines within a couple mms from each other? If not, some setups may have a chainline that"s less than straight. Then again, this is a conversion device, not soething for the hardcore SS"er. Oh wait, the roller is placed on the arm with some spacers in between, that adds 2-3mm right there.
I hope the RennenDesignGroup will stay in cycling for a long time, some more innovative products are bound to come from it.
www.rennendesigngroup.com
Happy trails,
J