Cero - If you were asking me, I'd vote for the 1,60 or maybe even the 1,30. I bet that 1,60 and 1,30 can handle higher pressure than the 2,1? Are you getting the tires from a bike shop or buying them online?
I am not impressed by the Continentals. Low inflation pressure and poor selection of sizes. I've switched from a 2" Hemisphere (that's the tire brand for Specialized bikes) down to a 1.5" Schwalbe. I'm doing a long-distance road test this weekend, I'll post numbers as soon as I can.
Please let me warn you about the large tires:
- check to make sure the tread of the tire will not scrape or rub the kickstand. I had a problem with that when I installed a two-legged kickstand. My original very-wide-profile tires scraped. After that, I went with higher-profile slightly narrower 2" tire and it didn't scrape. Also saw an improvement in speed and efficiency.
- I've had trouble with V-brake clearance on the VERY fat tires: the pads "want" to come into contact with the tire on the way to the rim sidewall. I adjusted the pads downward and it helped, but at the cost of contact surface area. It was very bad, as the pad started wearing faster in one section but leaving another section untouched
- I don't know which motor wheel you have, but the rim that comes with the 9c motor does not work well with a 2" tire: the 2" tire is just too fat for the little 23mm wide rim and a smaller tire will work better and ride more efficiently. I found that the 9c rim is "happiest" with a tire SMALLER than 2": either a 1.5" or a 1.75" tire was way better.
- NOTE that the Schalbe 26" x 1.5" tire, model # 40-559, has an inflation pressure range of 60-110psi. Whether you use the higher pressure or not, it's a good thing to have, as it demonstrates it's a high quality tire. I've just begun to tap the efficiency potential of this tire at 65psi!
- The Schwalbe has a reflective sidewall, which I want very much. (So does the CORPORAL tire mentioned earlier, which appears to be a pretty good copy of the big Schwalbe at a very low price.)
I don't mean to come off as a Schwalbe fanboy, but so far, I am.
The Schwalbe is expensive, so I'm also looking at Kenda Kwest and Cyclops (http://www.amazon.com/CST-Cyclops-Tire- ... ef=sr_1_20
. 9C 2810, 6-FET,CA,18S3P LiPo, Kenda Kwest. 33mph max 12.8Wh/mi (22mph avg) Phat Bike Commuter
HS3540, 6-FET, 18S3P LiPo, Schwalbe Marathon 47mph max 25 Wh/mi (28mph avg) Basic LiPo Charging Thread
, Add Throttle to Multispeed Bike
dogman: "I bet if you just don't ride like a jerk, you can do whatever you want up to the speed where everybody looks at you like this.
tomjasz: "Romans go full dork. They could give a hoot what 'Merkins do."