Does sealant contribute to rolling mass?

[RexFuzzle]

I think it is an interesting topic this.

 

If all the sealant sits at the bottom of the tyre while you're going you are essentially having a lower centre of gravity compared to it being spread out evenly around the tyre due to the centrifugal force.

The question is: At what speed does the sealant become more or less evenly spread out?

 

Also raises the point that if you are not going fast enough the majority will be at the bottom and towards the back of the tyre, which is good for if you just went over a thorn or something.

 

Hmmm, trying to calculate the speed.

[blondeonabike]

I think it is an interesting topic this.

 

If all the sealant sits at the bottom of the tyre while you're going you are essentially having a lower centre of gravity compared to it being spread out evenly around the tyre due to the centrifugal force.

The question is: At what speed does the sealant become more or less evenly spread out?

 

Also raises the point that if you are not going fast enough the majority will be at the bottom and towards the back of the tyre, which is good for if you just went over a thorn or something.

 

Hmmm, trying to calculate the speed.

The answer is not simple. Different brands of sealant have different viscosities so the speed at which the sealant will evenly distribute throughout the tyre will vary according to brand, and minor deviations will also occur between different batches. Edited May 30, 2014 by blondeonabike

[blondeonabike]

.double post sorry

Edited May 31, 2014 by blondeonabike

[PhilipV]

short answer: yes, the sealant will contribute to rolling mass.

more complex answer: the sealant will contribute to rolling mass, but the difference will me marginal, and the benefit is more than the weight penalty incurred.

 

There is an old saying that goes "an ounce on the wheels is like two on the frame" but ever time I add sealant ibthink about a trailside tube replacement, and then add a bit more sealant.

[BarHugger]

....so sealant is not the issue, right???....but rather focussing on the following:

[clyde79]

....so sealant is not the issue, right???....but rather focussing on the following:

 

This thread has (not unexpectedly) derailed quickly.

However, that diagram you have provided is quite interesting. Less going on in the recovery phase than I think I had assumed. I'd be interested to see others that compare muscle usage during the pedal phases for different bicycle geometries. I'd particularly like to see for a TT bike.

[Ryan's dad]

Ok seriously , I think that when the wheel is stationary the fluid will be at the bottom but once the wheel starts to spin it will move to the outside of the tire( the bit in contact with the earth) and I have the picture of a washing machine on spin cycle with the clothes on the outside in my mind.

So yes , it will increase the rolling mass but it will be minimal , I doubt that I would ever know or feel the difference. Remember that you are also removing the tubes mass and replacing it with a thin fluid that will save you some serious frustration on the trail side.

Unless the sealant has turned into balls of snot but that's a whole different topic ( and also on the hub ..)

[Guest EdEdEd]

Ok seriously , I think that when the wheel is stationary the fluid will be at the bottom but once the wheel starts to spin it will move to the outside of the tire( the bit in contact with the earth) and I have the picture of a washing machine on spin cycle with the clothes on the outside in my mind.

So yes , it will increase the rolling mass but it will be minimal , I doubt that I would ever know or feel the difference. Remember that you are also removing the tubes mass and replacing it with a thin fluid that will save you some serious frustration on the trail side.

Unless the sealant has turned into balls of snot but that's a whole different topic ( and also on the hub ..)

 

The only way is to ride with constant wattage on a flat rode for about a 1000km... and then repeat it with sealant... compare average speeds!

[Gen]

Or .. don't put sealant in.. use a tube then get a flat and spend 10min changing a tube.

[Guest EdEdEd]

Or .. don't put sealant in.. use a tube then get a flat and spend 10min changing a tube.

Precisely... won't slow you down at all!

[Gen]

I'd rather carry a bit extra weight than have to spend time fixing stuff.. that's why I am not weight obsessed.. the only mechanicals I have is when my body breaks down. . Or falls down

[Ryan's dad]

 

 

The only way is to ride with constant wattage on a flat rode for about a 1000km... and then repeat it with sealant... compare average speeds!

Sounds like fun , what you doing next week?

 

[Guest EdEdEd]

Sounds like fun , what you doing next week?

Yah, next week is tough with work and all, you know, i need to give notice for leae, and I had this niggle in my back I am just wondering about, you know, maybe some other time

[blondeonabike]

I'd rather carry a bit extra weight than have to spend time fixing stuff.. that's why I am not weight obsessed.. the only mechanicals I have is when my body breaks down. . Or falls down

Ultimatley it always boils down to the weight issue......

 

Option A :Shave head remove gall bladder, appendix and donate one kidney.

Option B: Sandblast all the paint off your bike, and remove your entire brake system. Only amateurs use brakes anyway.

Option C:Ride with no helmet, shirt and shoes. Gen I think this option is for your OH, he's got half of it down already!

[Gen]

Ultimatley it always boils down to the weight issue......

 

Option A :Shave head remove gall bladder, appendix and donate one kidney.

Option B: Sandblast all the paint off your bike, and remove your entire brake system. Only amateurs use brakes anyway.

Option C:Ride with no helmet, shirt and shoes. Gen I think this option is for your OH, he's got half of it down already!

 

Ha ha ha indeed

[Eddy Gordo]

Or .. don't put sealant in.. use a tube then get a flat and spend 10min changing a tube.

 

U take 10min to change a tube?? I take more or less 3 min