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Discussion Starter · #1 ·
I got a Specialized 29er in yesterday. Below are photos of it, a Jones ACX and a EpiWolf all mounted. The Fast Trak seemed as wide but not as tall as the Bonti. It was not as wide of the WTB nor as tall. The side knobs feel a bit squirmier than the WTB however the center knobs feel more firm. The weight was about equal to the Bonti. The Fast Trak felt more supple than the Bonti.
 

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Discussion Starter · #5 ·
I tied making png files in Photoshop CS2. They looked great and colourful and were small, around 175 kb. I am used to png files since Wikipedia enfornces that format. Well MTBR restricts png file to some insanely small amount, like 19 kb. Why I do not know. They allow gifs up to 200 kb.
 

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Discussion Starter · #8 ·
Rainman said:
How does the Exi compare to the FT?

I'm currently running the Exi's and love 'em...but if the FT's are better i'll get some.

R.
I think it will depend on what you are looking for. For normal riding in State college (major-rocky) I like to run tires at pretty low PSi and assume the F-T will be more apt to pinch flat than the Exi. For racing in areas without major rocks I think I'll be able to run the F-T with no problems. I think the F-T will have better braking and pwer traction than the Exi but less than the Bonti
 

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Raymo853 said:
I think it will depend on what you are looking for. For normal riding in State college (major-rocky) I like to run tires at pretty low PSi and assume the F-T will be more apt to pinch flat than the Exi. For racing in areas without major rocks I think I'll be able to run the F-T with no problems. I think the F-T will have better braking and pwer traction than the Exi but less than the Bonti
I think you may be right on the money with your Exi/FT comparo. I flatted my front proto FT at the SSWC, and I believe the Exi would have survived. But, it was a race and I think the Exi's would have been slower due to their weight and tackiness. I ride an Exi up front with a Mythos R in the back on daily rides and break out the FT's for race days. I would absolutely ride the Exi's if I lived in State College! ;)
I still want to try the Bonti ACX's for the sloppier, rootier stuff I encounter most rides...

OGG
 

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Isn't pinchflatting more about tube strength/suptleness and stretch?
Sure the tough sidewalls of the will resist the tire from deforming up to the rim, but you could also just run slightly more psi in the FT and get the same compliance plus more speed?
 

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Cloxxki said:
Isn't pinchflatting more about tube strength/suptleness and stretch?
Sure the tough sidewalls of the will resist the tire from deforming up to the rim, but you could also just run slightly more psi in the FT and get the same compliance plus more speed?
Uh... Clox...
More PSI slows down rolling resistance and takes away compliance/give. You, of all folks, know this!
Why do you think we keep calling for tires with more volume (and not too much weight)? ;)
 

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OneGearGuy said:
Uh... Clox...
More PSI slows down rolling resistance and takes away compliance/give. You, of all folks, know this!
Why do you think we keep calling for tires with more volume (and not too much weight)? ;)
A stiffer casing is less compliant at the same pressure compared to a tire with a more supple casing. I have a few DH tires that could be ridden without air pressure and you would not bang the rims.
 

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Clearly that's not always true...

OneGearGuy said:
More PSI slows down rolling resistance...
I for one am waiting to see the actual data -- none of this subjective stuff -- that proves this statement. Clearly, it can't be true for all PSI or we'd all ride flat tires. At what point does higher PSI mean greater rolling resistance? I realize it's going to be a complex issue -- comparing tarmac to rough hardpack to grass to loam to sand to slickrock to babyheads to gravel roads. Seriously, if I've missed the study/experiment that proves that statement true, please tell me where to find it...
 

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OneGearGuy said:
I still want to try the Bonti ACX's for the sloppier, rootier stuff I encounter most rides...

OGG
The ACX is an awesome tire for the slop. It's very forgiving and rolls suprising well for a full knobby. I like them so much I can't seem to bring myself to use the FTs I got from Nate. YRMV.
 

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shiggy said:
A stiffer casing is less compliant at the same pressure compared to a tire with a more supple casing. I have a few DH tires that could be ridden without air pressure and you would not bang the rims.
Of course. But I am just talking about my perceived difference in "cush" and flat resistance of the 2 aforementioned tires: FT and Exi.
 

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PeT said:
I for one am waiting to see the actual data -- none of this subjective stuff -- that proves this statement. Clearly, it can't be true for all PSI or we'd all ride flat tires. At what point does higher PSI mean greater rolling resistance? I realize it's going to be a complex issue -- comparing tarmac to rough hardpack to grass to loam to sand to slickrock to babyheads to gravel roads. Seriously, if I've missed the study/experiment that proves that statement true, please tell me where to find it...
I am not interested in isolated lab tests; just taking all the above real world data based on where and how I am riding, the tires I am riding, and then finding the right balance of PSI. A road bike and a trail bike are dealing with speed in different ways, though traction is a most important factor for both.
 

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OneGearGuy said:
I am not interested in isolated lab tests; just taking all the above real world data based on where and how I am riding, the tires I am riding, and then finding the right balance of PSI.
Nor am I, but quantitative real world tests are possible. I guess I'm just tiring of subjective, one-off opinions and comprehensive statements about what's true when there's no supporting evidence...
 

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erik99 said:
The ACX is an awesome tire for the slop. It's very forgiving and rolls suprising well for a full knobby. I like them so much I can't seem to bring myself to use the FTs I got from Nate. YRMV.
Thanks for the great input. They will be my next purchase- sounds like they will be the ideal springtime tire for these parts. :D
 
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