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View Full Version : B4 -vs- B4.1 differences

c0sie
13-01-2010, 01:54 PM
Just been looking around the AE website and noticed that the B4.1 is different in size to the B4. The B4.1 is wider and longer than the older B4.

Anyone know why this is??

B4 width = 246mm
B4.1 width = 250mm

B4 wheelbase = 273mm
B4.1 wheelbase = 288mm

B4 length = 366mm
B4.1 length = 377mm
Darren Boyle
13-01-2010, 02:03 PM
The new chassis will have somthing to do with it, but not all of those altered dimensions though.......
ashleyb4
13-01-2010, 02:29 PM
If its wider it might struggle to be legal.....

A
c0sie
13-01-2010, 02:30 PM
Ash,

The B4.1 according to the AE site is 250mm wide.

According to the Losi site both the XXX4 and the XXX-CR are 251mm.

BRCA and IFMAR rules are 250mm maximum width arent they?
c0sie
13-01-2010, 02:32 PM
Naughty Losi :D
coolcars782
13-01-2010, 02:35 PM
Ash,

The B4.1 according to the AE site is 250mm wide.

According to the Losi site both the XXX4 and the XXX-CR are 251mm.

BRCA and IFMAR rules are 250mm maximum width arent they?

So how does the losi's get away with it when getting scrutineered ?
pugboy
13-01-2010, 03:49 PM
Ash,

The B4.1 according to the AE site is 250mm wide.

According to the Losi site both the XXX4 and the XXX-CR are 251mm.

BRCA and IFMAR rules are 250mm maximum width arent they?

That 250mm probably includes the sidewall projection on the tyre, which may well be less on a typical minispike/BB tyre than the stock Losi tyre. I've never had any issue getting mine in the box, although it's fairly tight.
peetbee
13-01-2010, 08:50 PM
The only issues with Losi's being too wide that I've seen has been the very ends of the axles catching on the box.
But it's been so borderline that it's passed at round one and then failed round two!!
MikePimlott
13-01-2010, 09:13 PM
I've never had any issue getting mine in the box, although it's fairly tight.



:woot: charming
Spencer Mulcahy
13-01-2010, 10:41 PM
Ooohhh matron.:woot: