On a course behind the depot and R Adams and Sons Hauliers on Liveridge Hill, Corder took his seventh win in a row, with Tinsley second once again.
Tamsin Moss won the under-6s race, ahead of the boys, to lead the overall series.
At senior level, Stratford’s Teresa Lewis was third in the women’s under-45s, and Nigel Jones just missed a podium place in the under-50s.
Around 400 riders, from the age of five to 65, attended the races.
For more, see this week’s Herald.