Should I buy new foams for my new 40 series Mashers?

[bdebde]

Only problem with most of the molded foams is that they are for low profile tires, which the Mashers are not. You may end up with some dead air space in there as the foam won't completely fill the tire. You may want to try the losi 2-stage foams (LOSB7222), they are firm with a soft layer near the tread, I really like em. I think the standard losi ones (LOSB7221) are pretty firm if that's what you are looking for.