"These cranks use an interlocking chain ring/crank interface secured by four stainless steel chain ring bolts." http://www.paulcomp.com/rdcrank.html
But it'll cost you about £120+ as oppose to £20/£50 for a regular ring from another company
@Pistanator started
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But it'll cost you about £120+ as oppose to £20/£50 for a regular ring from another company