Niflheim 600's with Pursuit's in background
Nothing but walls with no brakes
Sunday morning I met up with Brett R at his house for a two hour roll. He warned me to make sure I bring good working speed reducers (like my big-wheeled Aero's). I brought my new Niflheim's instead. Brett's route is more or less an out and back in Westborough, MA. It was friggin hilly. None of the Littleton gentle rollers, these were full-on walls. I think Brett wanted to hurt me. The steepest climb had a sustained grade of 16% per my Garmin. The pavement was not good, chip seal over busted asphalt. At the top, Brett said we had to go back down that! This is from a guy who's more cautious on the descents than I.
We hit a chip seal descent that was really rough. With no speed reduction set, the latches rattle something fierce on the S600's. It was so loud it was hard to talk to Brett over it or hear approaching cars. The rattle wasn't the only annoyance. The stiff aluminum shafts sent all that vibration into the ankles. It was so intense that it tickled funny bones in my feet, making me recoil from the vibration. I think my Pursuit's would behave similarly on this particularly harsh section of chip seal, but without the rattles. The extra heavy duty shafts on the S600's don't exactly help dampen vibration.
Min and max speed reducer resistance settings
Two ways to improve speed reducer resistance range
Plummet of Death with stair step climb in distance
We had a long stair step climb coming up next. We had been out about 90 minutes, and I still felt pretty good. Kind of knowing the way back, I passed Brett and ratcheted the pace up a notch. I V2'd pretty much the whole way up the sucker and put a little distance on Brett. That was payback for the hairball descent. We got back to Brett's house in exactly 2hrs rolling time, covering 17.0 miles with 1600ft of climbing. Seems really slow, but you'd have to see the climbs and some of the pavement to have the whole picture.
In summary, here's what I like and don't like about the Niflheim S600's:
Seem ultra durable
All stainless steel hardware (salty roads no problem)
Speed reducer releases easily (V2's are awkward)