If you’re looking for the mtb helmet under 100 you’re in the right place. We spent a lot of time reviewing best mtb helmet under 100 to come up with the Ten that we think stand apart from the pack in style, functionality, and value. In this guide, we have reviewed all the products and generated the best options available today for you.

We analyzed and compared 36 mtb helmet under 100 sold for nearly 36 hours, and considered the opinions of 660 consumers. Following our last update, our favorite model is the Men Women Cycling Cap Helmet Liner Hat Outdoor MTB Sun Proof Anti-Sweat Breathable Riding Yellow. However, if you don’t want to spend extra then we have another vast option for you is OutdoorMaster Full Face Mountain Bike Helmet for Men & Women-Two Removable Chin Pad Mountain Bike Helmet Grizzly, Ventilation Lightweight Racing Downhill DH BMX MTB Helmet (Flaming Red, Large).

Below is a review of some of the best mtb helmet under 100 together with their extra features and functions. Wanna find the Top mtb helmet under 100? Read the below list right the way.

Best mtb helmet under 100

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Product Title
Score

100% Trajecta All Mountain/Endurance Mountain Bike Helmet - Lightweight & Breathable MTB Smartshock Cycling Helmet w/Visor and Chin Bar
9.9

100% Status Downhill Mountain Bike/BMX Helmet - Lightweight & Breathable MTB Cycling Helmet w/Visor and Chin Bar
9.6

Weimostar Polyester Men Cycling Bike Bicycle Cap MTB Hat Sweat Wicking Outdoors Breathable Fits Under Helmets USA Honor Ride
9.3

OutdoorMaster Full Face Mountain Bike Helmet for Men & Women-Two Removable Chin Pad Mountain Bike Helmet Grizzly, Ventilation Lightweight Racing Downhill DH BMX MTB Helmet (Flaming Red, Large)
8.9

Men Cycling Cap Bike Bicycle MTB Hat Anti Sweat Sun Proof Outdoors Breathable Fits Under Helmets Polyester Dragon Black
8.4

Bike Helmet, Mountain Bike Helmets for Men and Women, Front and Back LED Lights Safe Certified MTB Road Bicycle Helmet with Adjustable Brim
8.1

ALTEC Helmet w Fidlock CPSC/CE Black LG/XL
7.8

Men Women Cycling Cap Helmet Liner Hat Outdoor MTB Sun Proof Anti-Sweat Breathable Riding Yellow
7.4

ILM Adult Mountain Bike Helmet Men & Women Full Face Lightweight BMX MTB Helmet ASTM CPSC CE Certified Cycling Helmet Model ZL-B068 (MB, Large)
7.3

GripGrab Lightweight Summer Cycling Cap UV-Protection Under-Helmet Visor Mesh Hat Thin Breathable SPF Bicycle Headwear White/Black
6.8

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Product Title

100% Trajecta All Mountain/Endurance Mountain Bike Helmet - Lightweight & Breathable MTB Smartshock Cycling Helmet w/Visor and Chin Bar

9.9

100% Status Downhill Mountain Bike/BMX Helmet - Lightweight & Breathable MTB Cycling Helmet w/Visor and Chin Bar

9.6

Weimostar Polyester Men Cycling Bike Bicycle Cap MTB Hat Sweat Wicking Outdoors Breathable Fits Under Helmets USA Honor Ride

9.3

OutdoorMaster Full Face Mountain Bike Helmet for Men & Women-Two Removable Chin Pad Mountain Bike Helmet Grizzly, Ventilation Lightweight Racing Downhill DH BMX MTB Helmet (Flaming Red, Large)

8.9

Men Cycling Cap Bike Bicycle MTB Hat Anti Sweat Sun Proof Outdoors Breathable Fits Under Helmets Polyester Dragon Black

8.4

Bike Helmet, Mountain Bike Helmets for Men and Women, Front and Back LED Lights Safe Certified MTB Road Bicycle Helmet with Adjustable Brim

8.1

ALTEC Helmet w Fidlock CPSC/CE Black LG/XL

7.8

Men Women Cycling Cap Helmet Liner Hat Outdoor MTB Sun Proof Anti-Sweat Breathable Riding Yellow

7.4

ILM Adult Mountain Bike Helmet Men & Women Full Face Lightweight BMX MTB Helmet ASTM CPSC CE Certified Cycling Helmet Model ZL-B068 (MB, Large)

7.3

GripGrab Lightweight Summer Cycling Cap UV-Protection Under-Helmet Visor Mesh Hat Thin Breathable SPF Bicycle Headwear White/Black

6.8

100% Trajecta All Mountain/Endurance Mountain Bike Helmet – Lightweight & Breathable MTB Smartshock Cycling Helmet w/Visor and Chin Bar


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100% Trajecta All Mountain/Endurance Mountain Bike Helmet - Lightweight & Breathable MTB Smartshock Cycling Helmet w/Visor and Chin Bar

$150.00
$139.44
 in stock
15 new from $124.84
Amazon.com
as of March 25, 2025 8:35 pm

Features

  • Smartshock Rotational Protective System (13 point)
  • Incredibly light, full face enduro and all mountain helmet
  • Multi-Density EPS foam injection molded with polycarbonate in two size specific molds (SM, MD and LG, XL)
  • Patent-pending chin bar integration
  • Massive airflow with a class-leading 24 ventilation ports

100% Status Downhill Mountain Bike/BMX Helmet – Lightweight & Breathable MTB Cycling Helmet w/Visor and Chin Bar


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100% Status Downhill Mountain Bike/BMX Helmet - Lightweight & Breathable MTB Cycling Helmet w/Visor and Chin Bar

$82.50  in stock
12 new from $78.45
Amazon.com
as of March 25, 2025 8:35 pm

Features

  • Ultra-light design featuring a composite fiberglass shell
  • Active cooling system increases airflow offering maximum ventilation while riding and also while rider is stationary
  • Removable comfort liner, cheek pads and chin strap covers for easy washing
  • Engineered single shell and EPS to achieve the best fit
  • Compatible with inflatable emergency helmet release systems

Weimostar Polyester Men Cycling Bike Bicycle Cap MTB Hat Sweat Wicking Outdoors Breathable Fits Under Helmets USA Honor Ride


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Weimostar Polyester Men Cycling Bike Bicycle Cap MTB Hat Sweat Wicking Outdoors Breathable Fits Under Helmets USA Honor Ride

$9.99  in stock
2 new from $9.99
Free shipping
Amazon.com
as of March 25, 2025 8:35 pm

Features

  • [Lightweight] The lightweight Cycle Hat that redefined comfort.
  • [Breathable Material] 100% polyester material gives your cap breathability and ventilation.
  • [One size ]Weimostar cycling under helmet cap is a one-size-fits-all item.
  • [Advanced Sewing Process] Three-needle and five-line process is more suitable for intense exercise.
  • [Ideal for Outdoor Sports] Nice choice for: cyclists, travelers, fitness

OutdoorMaster Full Face Mountain Bike Helmet for Men & Women-Two Removable Chin Pad Mountain Bike Helmet Grizzly, Ventilation Lightweight Racing Downhill DH BMX MTB Helmet (Flaming Red, Large)


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OutdoorMaster Full Face Mountain Bike Helmet for Men & Women-Two Removable Chin Pad Mountain Bike Helmet Grizzly, Ventilation Lightweight Racing Downhill DH BMX MTB Helmet (Flaming Red, Large)

$119.99  in stock
Amazon.com
as of March 25, 2025 8:35 pm

Features

  • Fit System - This mountain bike helmets for adults are suitable for head circumference of 57-62cm/22.44-24.40inch
  • Maximum Protection and Comfort: The mountain bike helmet with EPP collarbone impact system and chinbar shock pads.Stay Safe and comfortable in any condition
  • Lightweight and Breathable: Revolutionary injection-molded high-flow cooling ventilation channels- 27 vents,And it weighs just under 750g
  • Convenience: The MTB helmet with removable and washable comfort liner,and with two sets of D-rings of different thicknesses
  • Suitable For Goggles: Goggle-strap channel makes it easier to keep your goggles in place, Pivoting visor helps protect the wearer's eyes from the sun, wind and rain

Men Cycling Cap Bike Bicycle MTB Hat Anti Sweat Sun Proof Outdoors Breathable Fits Under Helmets Polyester Dragon Black


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Men Cycling Cap Bike Bicycle MTB Hat Anti Sweat Sun Proof Outdoors Breathable Fits Under Helmets Polyester Dragon Black

$10.99  in stock
Amazon.com
as of March 25, 2025 8:35 pm

Features

  • [Lightweight] The lightweight Cycle Hat that redefined comfort.
  • [Breathable Material] 100% polyester material gives your cap breathability and ventilation.
  • 【Stylish Design】 The stylish design pattern allows you to look handsome even after taking off the helmet
  • [Advanced Sewing Process] Three-needle and five-line process is more suitable for intense exercise.
  • [Ideal for Outdoor Sports] Nice choice for: cyclists, travelers, fitness

Bike Helmet, Mountain Bike Helmets for Men and Women, Front and Back LED Lights Safe Certified MTB Road Bicycle Helmet with Adjustable Brim


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Bike Helmet, Mountain Bike Helmets for Men and Women, Front and Back LED Lights Safe Certified MTB Road Bicycle Helmet with Adjustable Brim

$40.99
$35.99
 in stock
Amazon.com
as of March 25, 2025 8:35 pm

Features

  • 【Safe and Reliable】: The outer shell is made of high-density durable PC and the inner part is made of EPS foamed material, which can absorb the impact force and effectively reduce the impact pressure during the crash to protect the head. The helmet is also CPSC certified and European CE certified to ensure compliance with safety standards.
  • 【Front and Rear LED Lights】: Silkycasters bike helmet has 9 white LEDs on the front and 8 red LEDs on the back. (The LED lights have 4 modes: constant, blinking, fast blinking, warning blinking. Provides better safety and visibility at night and helps people behind you clearly identify where you are going.
  • 【Bicycle Helmet with Sun Visor】:Adult bicycle helmet with specially designed sun visor provides shade while cycling, allowing you to reduce glare and increase your field of vision. Adjust the visor up and down to adjust the angle of the sunshade, and you can also remove the visor when you don't need it.
  • 【Comfort & Breathability】: The adult bike helmet is designed to provide superior comfort for your cycling journey. Its removable, moisture-wicking, washable padding provides unrivalled comfort. The advanced ventilation system also features integrated vents that collect and direct airflow through cooling channels inside the helmet.
  • 【WIDE COMPATIBILITY】: The Silkycasters Cycling Helmet is an outstanding example of a high-quality helmet that is as comfortable as it is stylish. With a focus on urban commuting, this helmet is suitable for both men and women and is ideal for a wide range of activities including cycling, skateboarding and scootering.

ALTEC Helmet w Fidlock CPSC/CE Black LG/XL


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ALTEC Helmet w Fidlock CPSC/CE Black LG/XL

$93.28  in stock
11 new from $93.28
Amazon.com
as of March 25, 2025 8:35 pm

Features

  • Smartshock Rotational Protective System (14 point)
  • Multi-Density EPS foam injection molded with polycarbonate in size specific molds (XS/S, S/M and L/XL)
  • Integrated sunglass storage system
  • Washable, moisture-wicking liner
  • Nexus push release snap-buckle

Men Women Cycling Cap Helmet Liner Hat Outdoor MTB Sun Proof Anti-Sweat Breathable Riding Yellow


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Men Women Cycling Cap Helmet Liner Hat Outdoor MTB Sun Proof Anti-Sweat Breathable Riding Yellow

$10.99  in stock
Amazon.com
as of March 25, 2025 8:35 pm

Features

  • [Lightweight] The lightweight Cycle Hat that redefined comfort.
  • [Breathable Material] 100% polyester material gives your cap breathability and ventilation.
  • [One size ]Weimostar cycling under helmet cap is a one-size-fits-all item.
  • [Advanced Sewing Process] Three-needle and five-line process is more suitable for intense exercise.
  • [Ideal for Outdoor Sports] Nice choice for: cyclists, travelers, fitness

ILM Adult Mountain Bike Helmet Men & Women Full Face Lightweight BMX MTB Helmet ASTM CPSC CE Certified Cycling Helmet Model ZL-B068 (MB, Large)


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ILM Adult Mountain Bike Helmet Men & Women Full Face Lightweight BMX MTB Helmet ASTM CPSC CE Certified Cycling Helmet Model ZL-B068 (MB, Large)

$99.99  in stock
Amazon.com
as of March 25, 2025 8:35 pm

Features

  • Enhanced Safety: The full face mountain helmet meets ASTM-F1447, CPSC 16 CFR Part 1203, CE EN1078 triple safety standards, providing more comprehensive protection for every rider.
  • Protection: The ABS shell combined with black EPS foam (the chin bar part is EPP foam) provides strength and durability for optimal protection and cushioning performance. The chin bar part can provide additional face protection, especially on more challenging trail riding.
  • Lightweight and Ventilation: Weighing approximately 700 grams/1.52 pounds, this bike helmet greatly relieves excessive pressure on the rider's neck and shoulders. Multiple air vents mean maximum airflow, keeping bikers cool and comfortable at all times.
  • Removable Design: The wide visor can provide sun protection and the removable design takes into account different needs. The adult bike helmet with removable and washable comfort liner make it ideal to any adventure.
  • Suitable For Goggles: The MTB bike helmet is compatible with goggles, so you can match different goggles according to your preferences. Note: The goggles are not included in the package.

GripGrab Lightweight Summer Cycling Cap UV-Protection Under-Helmet Visor Mesh Hat Thin Breathable SPF Bicycle Headwear White/Black


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GripGrab Lightweight Summer Cycling Cap UV-Protection Under-Helmet Visor Mesh Hat Thin Breathable SPF Bicycle Headwear White/Black

$26.99  in stock
Amazon.com
as of March 25, 2025 8:35 pm

Features

  • - Designed for road-bike helmets, this retro vintage-style cycling cap completes your outfit; Wear the peak up or down, depending on your taste
  • + - This under-helmet cap with brim is your UV-protection when riding road, MTB or gravel in the summer sun; UV-rays are harmful to your skin, so it's better to be protected
  • - Designed for use in hot summer as a protective layer against sunburn on your head, the mesh material of this under-helmet cap is highly breathable and allows heat to dissipate
  • - Sweat is kept at bay and cools your head in summer; Thanks to the elastic interface at the rear of the cap, it sits tightly and securely under your helmet and at the coffee stop
  • - This headwear is part of the colourful GripGrab Mix&Match Series; It can be combined with other products of the Mix&Match Series; Simply good looking

This guide identifies some of the best mtb helmet under 100 currently on the market and also includes an in-depth buying guide to help you make the right decision. If you didn’t find your desired one check out the ALTEC Helmet w Fidlock CPSC/CE Black LG/XL is also the most sold item in the market. If you feel that the information provided here is misleading, incorrect, or is removed from actual facts, then please do not hesitate to get in touch with us. We will always be there for you.