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[[{“value”:”Adam’s been running foam tyre inserts for a decade, but James remains skeptical especially about the added weight for XC racing. We put them to the ultimate test in a Spanish rock garden, pushing James’s tyres to extremely low pressures without an insert, and then repeating the test with the super lightweight Vittoria Airliners installed. Watch as we find out exactly how low you can go for maximum grip and rim protection, and whether James is finally sold on the benefits of foam.
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⏱️ Timestamps ⏱️
0:00 – Intro: Why You Need Tire Inserts
0:25 – The Science of Low Pressure & Impedance Losses
0:54 – What Exactly Is A Tire Insert?
1:36 – Modern Inserts & Foam Density Explained
2:34 – 5 Key Benefits: Stability, Protection, Damping & Ride-Flat
3:40 – Downsides: Weight & Fitting (James’s Hesitation)
4:45 – Test 1: Rocky Climb – How Low Can We Go?
8:02 – Test 2: Rocky Descent – The Rim-Strike Limit
9:23 – Fitting The Vittoria Airliner XC
11:11 – Test 3: Inserts On The Climb & Descent
16:47 – Conclusion: Is James Sold?
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