I’m about 100kgs and my R&M Birdy Touring came with red rear elastomer which seems to be a little too soft. Trying to order hard one but they don’t seem to be available all that wide. Found this one but its grey and it reads hard. As far as I know hard ones are green. Is there a difference for elastomers for Birdy 1, 2 or 3 or they fit all models?