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Assos Endurance Thermobooster Bib Tights S11 - No Insert
Sale price
$240.00
Regular price
$240.00
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SKU: 11.14.303.18.2XS Option: Blackseries / 2XS
Pickup available at RA Cycles Brooklyn
Pickup available at RA Cycles Walnut Creek
Stock Availability by Location
RA Cycles Brooklyn In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
105 5th Ave, Brooklyn, NY 11217718-636-5242
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
RA Cycles Walnut Creek In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
2099 Mt Diablo Blvd, Walnut Creek, CA 94596925-433-7099
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
Distribution Center - East In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
Distribution Center - Central In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
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Assos Endurance Thermobooster Bib Tights S11 - No Insert
$240.00
Assos Endurance Thermobooster Bib Tights S11 - No Insert Info
The Assos Endurance Thermobooster Bib Tights S11 - No Insert are built as a layering piece rather than a standalone chamois short. Assos designed them to go over your existing summer bib shorts for cycling, or over Spring/Fall and Winter bib tights from the R and TACTICA series when conditions turn genuinely cold, and the unisex regularFit is cut to make that layering easy rather than bulky.
The fabric is RX EVO Plus, the warmest textile in Assos' RX EVO family. It resists odor, wraps the large muscle groups in asymmetrical stretch, and traps body warmth through low-volume thermoregulation rather than heavy bulk. The warp knit construction resists abrasion and holds its black color rather than showing white through the elastic as it stretches — a detail that matters on a piece meant to be worn as an outer layer.
Fit details carry over from Assos' Racing Series: a zeroPressure waist uses a soft, highly elastic material for hold without pinching, and an X-Frame suspension design limits sag on the lower back to keep the main body panels stable through the pedal stroke. Body-contoured shaping reduces seams to cut down on friction during layering, and raw-cut waist and ankle finishes keep bulk to a minimum. Large reflective stripes on the lower legs add visibility in low light, flashing with each pedal stroke. Because it ships with no insert, the Thermobooster also crosses over into winter running and skiing, where the same low-volume insulation and reflectivity carry over. Sizing runs 2XS through 3XL in Blackseries.
The RA Perspective
The Thermobooster is a smart piece once you understand what it's for: it's not a chamois short, it's a warmth layer. Ship it without an insert and Assos frees it up to go over whatever shorts or tights you're already wearing, which is exactly the point — you're not paying for or carrying a second chamois you don't need.
That means you do need a compatible bib short or tight underneath already, and buyers expecting a standalone tight with a pad will be surprised. Once that's clear, it's a genuinely versatile piece: over summer bib shorts on a cold morning, over R-series winter tights on the coldest days, or on its own for winter running and skiing.
The RX EVO Plus fabric is the standout here. It's warm without being bulky, and the X-Frame suspension keeps everything from sagging or twisting once you've got two layers stacked at the waist — something cheaper layering pieces tend to get wrong.
We'd point this at riders who already own a good chamois short or winter tight and want a flexible way to extend it into colder conditions, or anyone building a layering system for winter cross-training beyond the bike.
Assos Endurance Thermobooster Bib Tights S11 - No Insert Size Chart
ASSOS Men's Shorts, Knickers, and Tights Sizing
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