29ER Tyre preasure.

[Alien Racer]

I started on 2bar and still it seems to be to hard. Weight around 77kg, any comments from experts or experienced riders welcome.

[8848]

I ride on 2 bar, 80kg. seems fine most of teh time. 1.8bar if rocky.

[rattlesnake]

I ride 1.5 rear and 1.3 front. I do weigh 62kgs tho

[TNOSE_E]

Guys riding HT that I know 73kg - 76kg. 1.4 - 1.6 bar

[Iwan Kemp]

What bike?

Where do you ride?

How hard do you ride?

What tyres are you currently running?

 

Need to know some detail first before we can just fling advise.

[Iron]

im 74kg and after wrecking a new tire i settled on 2 barr all round .

for XCO marathons, rocky, sandy what ever .

2.1 Ritchey WCS tires

 

on a HT

Edited May 23, 2012 by Iron

[sometime]

29er HT: Started at 2 bar and now use 1.7 bar. The improvment in comfort and grip levels at the lower pressure is significant. I weigh 85kg and have had no problems with the bumping through to the rim or burping the tyre. I do however run high volume Schwalbe 29x2.25 tyres.

 

It's also NB to get your gauge calibrated. there is such a difference in the supposed pressures shown by the gauges on pumps as to make this whole debate almost pointless. I evenutally bought a digital gauge to check my pressures. Turns out 1.8 bar on my pump gauge is 1.6bar on my digital gauge.

[canfan]

I also weigh 77kg, I run 1.8 back and 1.4-1.5 at the front.

Edited May 23, 2012 by canfan

[Ysterperd]

I weigh 100kg and ride on 1.6Bar. Suggest that you experiment like Sometime suggested above. Take your usual riding trail and begin with 1.8 and drop it over the same trial over several rides, is however important to use the same gauge in order to get an accurate feel as gauges differ substantially.

[Alien Racer]

What bike?

Where do you ride?

How hard do you ride?

What tyres are you currently running?

 

Need to know some detail first before we can just fling advise.

I ride 29ER hardtail carbon, 2.1 tyres front and rear.

Next race 50km very technical and steep climbs.

[petatodd]

Stans NoTubes recommend the following formula to get the right tyre pressure in PSI:

 

Rider weight in kilograms x 2.2 to get to pounds

divided by 7

plus 2 for rear wheel

minus 1 for front wheel

 

to get Bar divide your answer by 14.5

 

So OP at 77kg = 169.4lbs

169.4/7= 24.2

Rear + 2 = 26.2psi = 1.67Bar

Front - 1 = 23.2psi = 1.6Bar

 

I prefer PSI as it's easier to see 26 and 23 on a pump than 1.67 or 1.6

[Lukep]

Stans NoTubes recommend the following formula to get the right tyre pressure in PSI:

 

Rider weight in kilograms x 2.2 to get to pounds

divided by 7

plus 2 for rear wheel

minus 1 for front wheel

 

to get Bar divide your answer by 14.5

 

So OP at 77kg = 169.4lbs

169.4/7= 24.2

Rear + 2 = 26.2psi = 1.67Bar

Front - 1 = 23.2psi = 1.6Bar

 

I prefer PSI as it's easier to see 26 and 23 on a pump than 1.67 or 1.6

remember it is rider weight with riding kit

[BLACKvoodoo]

Well I've just learned I'm riding my pressure WAY too high

[b-unit]

29er HT: Started at 2 bar and now use 1.7 bar. The improvment in comfort and grip levels at the lower pressure is significant. I weigh 85kg and have had no problems with the bumping through to the rim or burping the tyre. I do however run high volume Schwalbe 29x2.25 tyres.

 

It's also NB to get your gauge calibrated. there is such a difference in the supposed pressures shown by the gauges on pumps as to make this whole debate almost pointless. I evenutally bought a digital gauge to check my pressures. Turns out 1.8 bar on my pump gauge is 1.6bar on my digital gauge.

 

Where did you get the guage? Been looking for one but cant find.

[Iron]

Stans NoTubes recommend the following formula to get the right tyre pressure in PSI:

 

Rider weight in kilograms x 2.2 to get to pounds

divided by 7

plus 2 for rear wheel

minus 1 for front wheel

 

to get Bar divide your answer by 14.5

 

So OP at 77kg = 169.4lbs

169.4/7= 24.2

Rear + 2 = 26.2psi = 1.67Bar

Front - 1 = 23.2psi = 1.6Bar

 

I prefer PSI as it's easier to see 26 and 23 on a pump than 1.67 or 1.6

 

 

if I had to run my pressure according to this formula I will be going through rims like tire sealant , way too soft for me .

 

think this is a good starting point for someone who is not sure then you can personalize from there.

[sometime]

Where did you get the guage? Been looking for one but cant find.

 

Topeak from Morningside Cycles. It was expensive (R385) but I needed an accurate one for a race car and since it works with both Presta and Schrader valves I decided to make the investment.