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glassdoctor · 10.22.2007, 02:21 PM

Opinions vary... I think there is a difference but it's not huge. The XBR system has the regular bonded rotor 13.5 so it will likely run a little hotter and not have quite as much punch.

I don't run them, but a lot of my buddies do. The guys running the regular 13.5 (XBR) do just fine on the track and you can't tell any difference just watching. I don't know how much of it is in their heads... but some say the 13.5 pro is faster.

Maybe it matters in certain situations like on road or oval... but for offroad I can't see how it's a big deal. It's all about driving.

	(#3)
glassdoctor TEAM FUSION Offline Posts: 2,041 Join Date: Jul 2006 Location: Iowa... Hawkeye country	10.22.2007, 02:21 PM Opinions vary... I think there is a difference but it's not huge. The XBR system has the regular bonded rotor 13.5 so it will likely run a little hotter and not have quite as much punch. I don't run them, but a lot of my buddies do. The guys running the regular 13.5 (XBR) do just fine on the track and you can't tell any difference just watching. I don't know how much of it is in their heads... but some say the 13.5 pro is faster. Maybe it matters in certain situations like on road or oval... but for offroad I can't see how it's a big deal. It's all about driving. Jammin CRT MM/Neu 1515 1700kv Losi 8IGHT MM/Neu 1512 1900kv Kyosho 777 T4 MM 5700 B4 LRP XX4 MM 7700 old losi xxcr, MM4600 4s lipo 70mph+