whoa
a few questions there i can't answer!
i know about the 1/8 inserts as thats my regular class
as for tenth i've only done 1 meeting 2 weekends ago so i'll only have limited advice to offer!
basically all i know is the GRP conespikes i bought came with moulded inserts,
i've not used the tyres yet so can't comment on them & even if i had i'd have no experience with other tyres for comparison!
sorry to not be of any real help , but i give you all i got
i don't think the inserts are even available seperately
