friction roller dai/speed

[dchrist]

I agree with a more comfortable seat...I had it out riding this weekend, hit 32 mph with the 1.5 roller, so I was pleased with the performance...

 

[pumpbuilder]

Yeah, I didn't think you would need the 1.75 to bust thru 30 but didn't want to get flamed for saying so. Not having a clutch makes it more efficent and a lot quieter.

 

[dchrist]

Actually, I haven't had the opportunity to really see what it can do...such as a nice long stretch of flat road...oh yeah, I put the 1.75 back on...Has anyone been useing oak for rollers...they are pretty simple to make and was wondering how long they might last?

 

[Xqizid]

I would think they would glaze up if they slipped even the slightest bit.

 

[pumpbuilder]

Well I have never used Oak, just the aspen ones that came with my kit. Its funny, it seems you can use about any material if it's attached properly. But I have never heard of glazing from slippage, seen some heat marking however but the neat thing is once you set the legs to the right height/angle and use a tire spacer it stays set perfect even if I go up or down 1 size on my drive roller as there is enough "self adjustment" in the system to absorb the 1/4" change.

 

[dchrist]

Yes...I noticed the same thing about the legs and changing rollers...the system does seem to adjust to 1/4 inch either way. I thought about oak because it is from the family of hard woods, aspen is considered a softer wood. I haven't ridden long enough to determine the effects on the oak rollers, but it glazing does occur I could probably hit it with a piece of heay grit sandpaper for a few seconds. If the oak works as well as the aspen, I'll do a cost breakdown comparing the two.

 

[loquin]

yes -- using good old 30 weight -- I think that's what was recommended
get's a little hot down here (so calif) in the summers as you know

some have claimed much higher top speed than what I am getting
with the same basic set up

Robin 1.6 hp
1" roller
fair quality mountain bike
overall weight bike and rider 150 aprox
achieving a 22.5 mph on the true level ground

that's almost 1/5 th the speed that my stock Harley's used to do
more than happy with that

all that I can truly say for sure is
anytime on two wheels
it is fun to ride that MB THING

To back-calculate, if you getting 22.5 MPH with a 1 inch roller, the engine has to be running at 7567 RPM...

22.5 mph * (5280 ft/Mile) * (12 Inch/Ft) / (60 minutes/Hour) / (1 inch roller) / 3.14 = 7566.9

 

[Nuttsy]

FWIW,
When my bike was running; 95lbs loaded;200lbs of me; Subaru/Robin 33.5cc w/1-1/8" roller (unimproved Staton kit). 22mph cruise; 25mph sustainable on flats; 28mph wot on flats. Highest recorded speed-38mph slight downhill, wot, slight tailwind, full prayers; eyelids flapping like Woody, and tongue flapping at my ears as I was scared sh****ss!
Why anyone would want to go more than 25 no any kind of bicycle is beyond my old brain and bones.
WC

 

[pumpbuilder]

Well the speed thing comes from back when we were young and industructable, lol. In my crazier days 10+ years ago when I was also in better shape I had a full suspension model of the Bike E like in my photo here. The engine I was running then was an extra high RPM model and I put a 1.75 or 2" driver on it. I was showing off in a 60 MPH zone with big fat sholders, 4 lanes that were new smooth and straight and was pulled over by a Utah HP who wanted to know how the **** I was doing 58. The engine helped but really I was pedaling my XXs off.

The guys on the Harleys gave it a thumbs up. Now I am like you, 20-25 most of the time, 30-35 if it makes me safer with traffic.

 

[dchrist]

I was picturing in my mind the HP pulling you over and asking how the **** you did 58mph....I actually did laugh out loud... Do you still have the bike E?