samson99 Posted March 31, 2009 Posted March 31, 2009 what are the advantages of 1.95 in. tires over the standard 2.1 tires in teh western cape? is there any advantage or does the disadvantages outweigh the advantages?
Iwan Kemp Posted March 31, 2009 Posted March 31, 2009 No advantage. Go to this link and read what the people in white have to say on tyre pressures and width.http://www.bicicletta.co.za/Downloadable%20Docs/Rolling%20Resistance%20Eng%20illustrated.pdf
droo Posted March 31, 2009 Posted March 31, 2009 Weight saving. For anything else, the fatter the better, see The Crow's link. My theory is, if you're gonna ride fat tyres, do it properly.
parabola Posted March 31, 2009 Posted March 31, 2009 Thanks crow, that was quite an interesting read. So wider, low pressure tyres are best for most off-road conditions, and in some cases on-road as well.
Iwan Kemp Posted March 31, 2009 Posted March 31, 2009 Yip. You don't have to over do it, but 2.1 / 2.2 is a good compromise for XC. Then run them as low they'll go
Dirtbreath Posted March 31, 2009 Posted March 31, 2009 Havent read the article but I would only recommend a tyre as thin as a 1.9 in very muddy conditions at a higher pressure. Tread pattern also needs to be quite aggressive.
Cassie Posted March 31, 2009 Posted March 31, 2009 Very interesting indeed! Had it all wrong to say the least... That's why the tubeless fraternity swears by their products, i suppose.
Fleming Posted March 31, 2009 Posted March 31, 2009 I honestly don't think it makes that much of a difference. We are talking about 0.15 inches here which equates to just under 4mm. Â Â Â Some brands differ by this much for the same size tyre. I have seen 1.95 tyres that are wider than 2.1 tyres from a different brand. Â Â Â The overall width will also vary depending on the width of the rim it is mounted on.
LazyTrailRider Posted March 31, 2009 Posted March 31, 2009 Fleming, you're right, brands differ hugely in volume.Samson, I researched this topic heavily a couple of months ago. I was running a set of 2.0 Hutchinson Piranha Airlights on my hardtail with 80mm travel, and was finding the ride just a little too harsh at times, and too skittish at pressures just high enough to prevent pinching. Now I have a set of 2.1 Small Block Eights on. Having ridden with everything from 1.5 Panaracer Spikes to 2.5 DH monsters over the years, the theory of 'fat & soft = less resistance' fascinated me... My experience: tread pattern makes a huge difference to rolling resistance, not just fatness. Of course this seems obvious, but it also seemed obvious that the SB8s would be fast with their hundreds of little knobs and little spacing between them. They're not actually that fast! In my experience, the Piranhas are significantly faster (noticeably so) at the same pressures. They tend to wash a little easier (and less progressively than the SB8s, but they're quick. At the moment, I'm in two minds about the fat & soft thing, even though I like the concept  Sorry, not being much help, I know! Â
Santa C Posted March 31, 2009 Posted March 31, 2009 I find running 1.95 at the back and a 2.3 at the front great for mud
Anthony Posted March 31, 2009 Posted March 31, 2009 I just bought some 1.95s  my small blocks are 2.1 if u're still interested
Troi Sport Posted March 31, 2009 Posted March 31, 2009  I honestly don't think it makes that much of a difference. We are talking about 0.15 inches here which equates to just under 4mm.    Some brands differ by this much for the same size tyre. I have seen 1.95 tyres that are wider than 2.1 tyres from a different brand.    The overall width will also vary depending on the width of the rim it is mounted on.http://www.schwalbe.com/gbl/en/tech_info/reifenmasse/?gesamt=5&ID_Land=38&ID_Sprache=2&ID_Seite=141&tn_mainPoint=TechnikInfos Why are tires often narrower than the stated tire size?  Standardtire widths are calculated using fairly wide, standard rims. Yet inpractice, narrower rims are used more often, which in turn leads totires becoming slightly narrower as well.In order to ensure that tires have sufficient frame clearance, tiremanufacturers generally prefer to keep production closer to the lower end of the permitted tolerance (+/- 3 mm).Carcasscasing materials have become more and more sophisticated over time,that reduces the tire widening after the fitting. In order to correctthis tire widening, over the past few years slightly wider carcasseshave been used, so that the actual widths are now much closer to thestandard widths.  also see:http://www.schwalbe.com/gbl/en/tech_info/reifenmasse/ Â
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