Tested : Ben's Troy Lee Designs D4 Carbon MIPS Review.
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Review: Troy Lee Designs' D4 Carbon Helmet is a Worthy Successor - Pinkbike
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![Tested] Troy Lee Designs D4 Helmet | MTB-MAG.COM](https://www.mtb-mag.com/wp-content/uploads/2020/02/IMC_1699.jpg "Tested] Troy Lee Designs D4 Helmet | MTB-MAG.COM")