Is it fine to have a helmet without the rear interior pad? I bought me a second hand Tipperary helmet but it’s missing the rear interior pad.

I wouldn't recommend wearing a secondhand helmet unless it's never been used, and even then, you can't be sure it hasn't been dropped and messed up. I'd personally just go ahead and buy a new one- Ovation has some comfy, reasonably priced ones.
I think it’s way too risky. I always wear my helmet and I have always prefered spending more money on my helmet than on any other equipment. But again, it’s up to you
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