Trying to deal with Recumbutt on Silvio 1.5
- Thread starter bubbabent
- Start date
Actually, no way I could keep up...yet!
billyk
Guru
But being further forward makes stoppies more frequent, right? Long ago John T explained here that the center of mass of the bike+rider must be behind a line extending up from the front wheel contact point, sloped 60 degrees to the rear. We're typically close to that, and stoppies are a thing we do.
Have you ever seen anyone go over the bars stopping too quickly? Seems like that would be a very bad day.
Billy K
ratz
Wielder of the Rubber Mallet
Stoppies don't really happen unless you try to do them; it's easier to skid out the back wheel than it is to do a stoppie. The move forward ware talking abut here is under 1.5 inches to make the comfort correct; that's insufficient to mess up the center of gravity and in most cases it actually lowers your center of mass about 3 inches. Beginners tend to like a shorter boom and as a result they end up riding too high up on the seat back which inturn causes the back of the thighs to hit the seat pan just ever so slightly and poof recumbent butte sets in. Most people adapt over time to the correct position; assuming the fit is correct.
cranky cyclist
Guru
I always have to scoot my butt forward after a few minutes. Then it feels more comfortable.
hurri47
Well-Known Member
I got sixteen miles in yesterday with the extension removed. So far, so good. I suspect I will continue to like it, but I want to give it a little more time before I decide. It would be silly to sell an extension only to buy another one a month later.
If I do decide to give it up, I'm pretty sure it would fit any Silvio.
-Dan
Always-Learnin
Vendetta Love
Please keep me in mind!
Back on topic.. I finally used the original Cruzbike cushions and drilled two holes in the upper and lower, ran lock-tight straps through seat pan and cushions and looped through Ventisit back down through. so I have the cushions with Ventisit on top and they are secured to the seat pan with straps in two places. Tried it today and was pretty comfortable, although i was rained on for 16.5 miles!
ReklinedRider
Zen MBB Master
Heyyy sounds interesting....any pics forthcoming? Would love to see some
trplay
Zen MBB Master
I'm going to reluctantly throw this out. This isn't gospel and I could be wrong so please take it as an opinionated observation presented more for discussion rather than coming as a fact. First I believe Ratz is correct in his reasoning for recumbent butt. Second it looks like your set up is designed to set you up high as a truck driver? The stem is way higher than those I am use to seeing. It looks like you are stacking seat covers to catch up to the height of the handlebars. I have often thought that if recumbent riders were horsemen saddles would be lined with foam. All that cushion is not needed. It places you higher than you need to be and robs you of power while yielding no real gain in comfort. I would suggest you try scooting forward while using one seat cushion and lowering the handlebars one or two stem spacers.
hurri47
Well-Known Member
My stem spacers are similar, and I have thought about rearranging them to lower my hands, but won't that require cutting off some fork tube?
-Dan
super slim
Zen MBB Master
trplay, I really haven't looked closely at any other Silvios and these spacers were in the used kit I purchased so I used them. I guess I figured that I should use them so I don't know. I have a 42-43 Xseam 6ft tall but long waisted, 32 inch inseam and figured I am in the middle sizes for this bike. Super Slim could be on to something with the extension, how do you figure the 55mm change in BB height? Anyway, I think you do have to use a cutter on the fork tube to drop spacers from viewing Ratz Vendetta build, he mentions it. Anyone else care to comment on the spacers or extension? (my ears are open)
trplay
Zen MBB Master
Everyones body build is different and makes the angle of the dangle change. But I believe you can move at least one spacer above the handlebar stem before having clearance issues between the clamp, fork, and boom. In fact I thinking two since your x-seam isn't on the large size (the lower the feet the steeper the boom angel.) Who knows but I would give it a try. Yes I will differ to the wisdom of Ratz on this. Another point is there is nothing wrong with cutting the fork stem if it actually improves the fit.
