mtb
✓ Verified Active Listing
Race Day XC Round 4 - Thunder XC
🧬 Course DNA & Technical Intel
🛞 Recommended Tire
2.2" – 2.4" XC Tubeless
🚴 Discipline
mtb
🏁 Course Distance Options
Youth Boys 7-11
Youth Boys 4-6
Youth Girls 7-11
Youth Girls 4-6
Boys 12-14
Boys 15-18
Novice Men
Novice Men 40+
Novice Men 50+
Sport Men
Sport Men 40+
Sport Men 50+
Men 70+ Open
Girls 12-14
Girls 15-18
Novice Women
Novice Women 45+
Sport Women
Sport Women 45+
Women 60+ Open
Expert Women
Expert Women 45+
Pro Women Open
Boys Push Bike presented by Jannetty Racing
Girls Push Bike presented by Jannetty Racing
Expert Men
Expert Men 40+
Expert Men 50+
Men 60+ Open
Pro Men Open
Single Speed Men Open
E-Bike Masters Men 45+
E-Bike Men Unlimited
E-Bike Women Unlimited
E-Bike Open Men
E-Bike Open Women
E-Bike U19 Boys
E-Bike U19 Girls
About Race Day XC Round 4 - Thunder XC
Official registered mtb event in Charlemont, MA. Direct registration on BikeReg.
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⚙️ Recommended Pro Hardware for Race Day XC Round 4 - Thunder XC
Top-rated power meters, radar, and GPS computers curated by Threshold Cycling.
Dual-Sided SPD Accuracy
View Product Specs ↗
Favero Assioma Pro MX-2 Power Meter Pedals
$759.00
±1% real-world power accuracy, seamless Bluetooth/ANT+ connectivity, and full rock strike durability designed specifically for gravel epics.
Backcountry Safety
View Product Specs ↗
Garmin Varia RTL515 Radar Tail Light
$199.99
Detects approaching vehicles up to 153 yards away with visual and audible cockpit alerts on your GPS computer. Vital for remote rural gravel roads.
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