Bit of a shamless plug but we're an advertiser here now.... TQ Racing has been doing high performance wire since 1990 for slot cars and we've always used the thinnest strands possible both for both performance and durability: 18 gauge - 413 strands, 16 gauge - 665 strands, 13 gauge - 1,296 strands.
We have a new wire line just for RC, check out
www.tqracing.com