Noob changes sealant

[GhostRider2]

This is following on from this thread:

 

http://www.thehubsa....ithout-sealant/

 

 

So I decided to change my sealant myself and see how it goes.

 

I removed my Mountain King from my Alex 44 rim. Came off easily.

 

Inside I found one of these (the spongy thing, not the bomb):

 

http://www5.picturepush.com/photo/a/8107753/220/8107753.jpg

 

I then scrubbed as much of the old sealant from the rim and the inside of the tire. Big mission but I got most of it off.

 

I wanted to see if I could get the tire back on so did so without sealant just to see if I could get it on.

 

With the floor pump, never. With a bomb, easy peasy.

 

I inspected the inside of the tire carefully and could find no evidence of any thorns or puctures whatsoever.

 

Did I then need to have sealant in the past? Dunno. I any case I'm off to add new sealant as per advice received.

[Cav']

Nice, i'm glad you decided on adding sealant. LoL

[GhostRider2]

Nice, i'm glad you decided on adding sealant. LoL

 

Ja and thanks for your input.

 

I was worried about getting the tire to seat but it's much easier than I thought!

[Carrot]

Well, when your rim looks like mine does, you'll definitely need sealant... All those post about running tubeless nice and low-pressured is nonsense to me, just one trip to groenkloof with the tyre under 2.1 will have you hurting the rims :-S And I've tried to get those bends out without hurting the rim - that too is a no-go...

 

It surprises me how strong something so light weight could be. Well, until it comes between you and an edged rock at 40km/h of course

[GhostRider2]

Well, when your rim looks like mine does, you'll definitely need sealant... All those post about running tubeless nice and low-pressured is nonsense to me, just one trip to groenkloof with the tyre under 2.1 will have you hurting the rims :-S And I've tried to get those bends out without hurting the rim - that too is a no-go...

 

It surprises me how strong something so light weight could be. Well, until it comes between you and an edged rock at 40km/h of course

 

I run my tires at 2.5ish and have never had an issue. I'm also not the most aggressive rider and will usually take the route less technical.

[Tankman]

Well... All those post about running tubeless nice and low-pressured is nonsense to me, just one trip to groenkloof with the tyre under 2.1 will have you hurting the rims :-S

 

Well ... then you either have crap rims or crap tires or you weigh 120kg plus.

 

I have ust rims with ust tires an the front is normally around 1.6 and the rear 1.8 and I'm no lightweight.

[GhostRider2]

Well ... then you either have crap rims or crap tires or you weigh 120kg plus.

 

I have ust rims with ust tires an the front is normally around 1.6 and the rear 1.8 and I'm no lightweight.

 

What are the benefits of running the lower pressure?

 

I have tried lower pressures and it feels slower and less "sure footed".

[Carrot]

Well ... then you either have crap rims or crap tires or you weigh 120kg plus.

 

Nope, they be Mavic 317's, and I've pretty much always had a Maxxis tyre on them. And I weigh 65.

 

What are the benefits of running the lower pressure?

 

The optimal pressure differs for every setup. But having lower pressure means you've got more grip because a larger surface area of the tyre come into contact with the road surface. [Force=Pressure x Area - the force/your weight remains constant, so decreasing pressure means area increases linearly and so does the grip]

 

Also, lower pressure means a softer ride, especially for a hardtail bike. But as you run a lower pressure the tyre bends the whole time as it comes into contact with the road, which creates friction within the tyre itself and thus making your peddle harder (increased rolling resistance).

 

But I've learned the hard way that when you have your tyre run too low then there is a chance it'll come off the rim. This hurts, so much...

Edited April 23, 2012 by Carrot

[Tankman]

 

 

What are the benefits of running the lower pressure?

 

I have tried lower pressures and it feels slower and less "sure footed".

 

Not sure how you manage that, lower pressure gives you better traction, the tire spreads out better. Sure, tire pressure is terrain dependent and they might feel a bit slower at lower pressure but I don't have my front tire slipping out underneath me when cornering hard like I used to while using tubed tires at around 2.8bar.

 

 

 

Nope, they be Mavic 317's, and I've pretty much always had a Maxxis tyre on them. And I weigh 65.

 

Not a ust rim, what Maxxis tyre?

 

Take your weight and add a bit below half of that to get into my range

[GhostRider2]

Not sure how you manage that, lower pressure gives you better traction, the tire spreads out better. Sure, tire pressure is terrain dependent and they might feel a bit slower at lower pressure but I don't have my front tire slipping out underneath me when cornering hard like I used to while using tubed tires at around 2.8bar.

 

Thanks, that makes sense. I ride hard single track and jeep track and avoid the technical stuff and high speed cornering so higher will be a bit better suited to me.

[Carrot]

Not sure how you manage that, lower pressure gives you better traction, the tire spreads out better. Sure, tire pressure is terrain dependent and they might feel a bit slower at lower pressure but I don't have my front tire slipping out underneath me when cornering hard like I used to while using tubed tires at around 2.8bar.

 

 

 

Not a ust rim, what Maxxis tyre?

 

Take your weight and add a bit below half of that to get into my range

 

But, but, I've been riding them tubeless for such a long time! I guess most of the damage's came from a monorail front and a crosmark/larsen combo at the back. I've gone onto the Mavic site now, and I guess when they state "tubetype" under features it means it's not ust?

Edited April 23, 2012 by Carrot