JOSEPHWEISSERT
Zen MBB Master
Here's another installment in the ongoing saga of the Thursday night A ride for your viewing torture.
Thursday Night A Ride: Lowrider Unchained (July 23, 2015)
- Thread starter JOSEPHWEISSERT
- Start date
DavidCH
In thought; expanding the paradigm of traversity
Hey I really enjoy watching your videos 
. I had a couple of DF riders today draft off me. They had to work really hard to catch up with me and one of them stayed with me for a couple of miles. It would be really good to be able to spoil the air drag down lower in order to exhaust them quicker but I guess that is not a very noble idea.
The other idea is changing my tyres to schwalbe one's tubeless 25mm and then for training pump them up for 95 psi and then for racing pump them up to 115 psi.
Might just do the latter.
. I had a couple of DF riders today draft off me. They had to work really hard to catch up with me and one of them stayed with me for a couple of miles. It would be really good to be able to spoil the air drag down lower in order to exhaust them quicker but I guess that is not a very noble idea.The other idea is changing my tyres to schwalbe one's tubeless 25mm and then for training pump them up for 95 psi and then for racing pump them up to 115 psi.
Might just do the latter.
JOSEPHWEISSERT
Zen MBB Master
I now run 25 mm Continental Grand Prix 4000s II tires at 120 psi. Very fast.
VenRiderGuy
Well-Known Member
Wow, loved your video. I'm envious, but getting into high motivation mode. Now, just waiting for the bike to get here.
Thanks for sharing....
Thanks for sharing....
snilard
Guru of hot glue gun
Great video. I would call it Cruzbike porn
Isn't it uncomfortable? I run 25 mm Schwalbe one. On 100 psi it was really harsh, now I am on 90 front/85 rear and it is acceptable. Maybe this is just difference in our weights, but 120 psi sounds like riding on solid wooden wheel for me.
JOSEPHWEISSERT
Zen MBB Master
I weigh about 168 pounds. The big difference is probably that I have the Volae seat and maybe you do not. The roads here can be harsh. But the seat compensates effectively.Isn't it uncomfortable? I run 25 mm Schwalbe one. On 100 psi it was really harsh, now I am on 90 front/85 rear and it is acceptable. Maybe this is just difference in our weights, but 120 psi sounds like riding on solid wooden wheel for me.
snilard
Guru of hot glue gun
You are not much bigger than me, I have 130 pounds. I have original seat. It is not perfect, but it does its job. I will maybe try Volae seat in feature, but probably not, the bike was expensive and I cannot and don't want to make it even more expensive.
You are really powerful rider. I see that I have a lot of space to improve when I am looking at your and others videos here on forum.
trplay
Zen MBB Master
Atta boy Snilard don't get suckered into a fancy smancy seat. The stock two piece works just fine. My old bones do just fine and I only use a cover--no padding. You might find like I did that its the head rest that makes all the difference. Make it bigger and softer and all the bumps and lumps disappear.
JOSEPHWEISSERT
Zen MBB Master
If I remember correctly, the Volae seat alone was about $300, the associated Ventisit pad was about $100, the ADEM 2C Standard headrest was $120, and the Ventisit pad plus shipping overseas for the ADEM headrest was $44, for a total of $564 - not cheap, but well worth the difference in my experience.
If you're talking about the Schwalbe One VGuard Clinchers, they measure 12.3 watts of rolling resistance at 120 psi, 12.8 watts at 100 psi, and 14.0 watts at 80 psi. So taking into account the curve, they are probably less than 13.4 watts at 90 psi and probably less than 13.7 at 85 psi. But then, your actual case will differ due to your body weight, your bike weight, the surface you ride on, your speed when riding (these measurements were taken at 18 mph), the temperature, using two tires (not just one), and the software used to measure the rolling resistance (accurate to 0.3 watts and averaged over three measurements). Even so, we can see that the rolling resistance increases nonlinearly as pressure decreases. From the data, we can expect that you will not increase your rolling resistance a great deal by dropping pressure to 85 or 90 psi. For a comparison, the same size Gatorskins measure 19.3 watts at 120 psi. Going from 120 psi to 85 psi using Ones increases RR by 1.4 watts. Going from Ones at 120 psi to Gatorskins at 120 psi (yes, the same pressure) increases RR by 7.0 watts. So you are still a lot better off with the Ones at 85 or 90 psi compared with Gatorskins at full pressure. The bottom line is that dropping pressure on your Ones should not waste a significant amount of power as the cost to achieve comfort as opposed to the financial cost of buying a different seat.
JOSEPHWEISSERT
Zen MBB Master
For me, it was also the shoulders. With a different seat, the whole upper seat and headrest are out a ways from the point of vibration, so the seat and headrest both act as a big shock absorber. I find it more comfortable than the stock seat and extra padding. If you can accomplish acceptable damping by other means, that's great, because I think the stock seat and headrest are lighter than the replacement seat that I have. And any means to lower the bike's weight is good.
trplay
Zen MBB Master
I have struggled with the headrest for two years. Probably have in excess of $400 in failed attempts to make it comfortable. I just keep telling the wife R&D is expensive, but she isn't buying this anymore. I told her to look at the Tour de France. Two hundred riders ride $15K bikes and it takes 42 mechanics to follow behind them in cars to keep them going. Still the road is littered with brand new broken bikes. She still isn't buying it. The latest neck rest attempt is a new $2 cover that is two inches wider and thicker than the stock head rest. It runs down to the shoulders and seems to be working well after 90 miles.
ratz
Wielder of the Rubber Mallet
Matěj
38 lbs is a large difference on a bike. It makes total sense that you'd be comfortable at 90/85psi combo. I'm the same weight a Joe, and with tubeless I can run 90psi and it's fine. I specifically went tubeless and wide tires to get down to those pressures. With tubes I have to crank it up to 105/110 ish or the wheels gets squirrelly under me because of deflection. They don't get rough on the body until 115-125psi.. At your light body weight revel in your 90/85psi combo; your watts/kg impact will be so nominal as to not really be worth discussion until you are loosing races by 5-10 secs.
I think I could ride the Silvio that way to; it's so soft if the preload is set up correctly. Not sure I'd try that on the vendetta. I'm always amazed how soft the Silvio is when I jump on it; without a doubt a different class of smoothing out the ride.
MrSteve
Zen MBB Master
The head rest on the 18 degree reclined seat that I built for my Sofrider is padded with an old, much-patched but still air-tight bicycle tyre inner tube.
Every other padding material I tried for the neck-rest/head/rest transmitted too much vibration.
Now, see, I'm an old guy and need my eyeglasses to see; too much vibration transmitted by my thick skull just makes my eyeglasses buzz on my nose.
The bike tube/air bag works so well that I have never got around to improving it.
Bear in mind, this is on a Sofrider V1, with working front and rear suspension.
My low 18 degree seat is very comfortable without any padding at all, but I DO pad it, because sweat is slippery.
There are pictures of all of this madness, tucked away in the, "Sofrider and Freerider Mods" section.
Hope this helps.
Every other padding material I tried for the neck-rest/head/rest transmitted too much vibration.
Now, see, I'm an old guy and need my eyeglasses to see; too much vibration transmitted by my thick skull just makes my eyeglasses buzz on my nose.
The bike tube/air bag works so well that I have never got around to improving it.
Bear in mind, this is on a Sofrider V1, with working front and rear suspension.
My low 18 degree seat is very comfortable without any padding at all, but I DO pad it, because sweat is slippery.
There are pictures of all of this madness, tucked away in the, "Sofrider and Freerider Mods" section.
Hope this helps.
JOSEPHWEISSERT
Zen MBB Master
That's an excellent idea. It's basically a pneumatic shock absorber.
Rick Youngblood
CarbonCraft Master
Nice Video Joe, gets ol' adrenaline running just watching it. Very impressive to see you pass a drafting pace line and run away from them. Would love to see a video like this with a rear camera too.
