Look out for them , they will wear a red S4C tee - shirt .
We 'll have volunteer marshals in place to guide the ride and groups of cyclists ; they will help slow down the front and support the rear to catch up .
Look out for them , volunteer marshals will wear a red S4C tee - shirt .
We 'll have volunteer marshals in place to guide the ride and groups of cyclists ; they will help slow down the front and support the rear to catch up .