Fox Racing Tecbase Bib Liner Base Layer Short Adult MTB Body Armor
Base layer bibs with built in chamois
The Tecbase Bib Liner Shorts are designed specifically to pair with all Fox mountain bike shorts and feature lumbar storage for up to two bottles making them an essential piece of kit. Ride long and ride in comfort, care of the triple-density chamois that'll ensure you're not lagging as the day shreds on. These comfortable and breathable liner shorts won't ride up and are with you for the long haul.
- Designed to pair with all Fox MTB shorts
- Lumbar storage for up to 2 bottles
- Stretch mesh for breathability
- Colors: Black
- Sizes: Small, Medium, Large, X-Large
- SKU: 31184-001




New or Brand New - Brand new item in original packaging (original manufacturer's warranty may apply).
Refurbished - Professionally restored and in perfect working condition. Original packaging may be missing or slightly damaged.
Used - Item has seen limited use but remains in good working condition. May show some limited signs of wear with small scratches or cosmetic blemishes. May arrive with damaged packaging or be repackaged.
Refurbished, Without Tags - Same as refurbished. Item may arrive with mising labels or tags.
Refurbished, Last Call - Same as refurbished. Last call or closeout item.

| S | M | L | XL | XXL | |
|---|---|---|---|---|---|
| A | Chest | 33-35 | 36-39 | 40-42 | 43-46 | 47-50 |
| B | Sleeve | 32-33 | 33-34 | 34-35 | 35-36 | 36-37 |
| C | Height | 5'6"-5'10" | 5'10"-6' | 6'-6'2" | 6'1"-6'3" | 6'1"-6'3" |
CHEST
With a tape measure, hold it level and measure around the fullest part of the chest, under the arms and around the shoulder blades.
SLEEVE
With elbow slightly bent, measure from the center behind the neck, over the point of the shoulder, around the elbow and down the wrist.

| 28 | 29 | 30 | 31 | 32 | 33 | 34 | 36 | 38 | 40 | |
|---|---|---|---|---|---|---|---|---|---|---|
| S | S | S | S | M | M | L | XL | XXL | XXL | |
| A | Waist | 28-29 | 29-30 | 30-31 | 31-32 | 32-33 | 33-34 | 34-35 | 36-37 | 38-39 | 40-41 |
| B | Hip | 34-35 | 35-36 | 36-37 | 37-38 | 38-39 | 39-40 | 40-41 | 42-43 | 44-45 | 46-47 |
| C | Inseam | 30-301/2 | 30-301/2 | 301/2-31 | 301/2-31 | 31-311/2 | 31-311/2 | 311/2-32 | 32-321/2 | 321/2-33 | 321/2-33 |
| D | Height | 5'6"-5'8" | 5'6"-5'8" | 5'8"-5'10" | 5'8"-5'10" | 5'10"-6' | 5'10"-6 | 6'-6'2" | 6'1"-6'3" | 6'1"-6'3" | 6'1"-6'3" |
WAIST
With a tape measure, hold it level and measure the circumference at the waist's natural bend.
HIP
With the tape measure, hold it level and legs straight. Measure the circumference at the fullest point.
INSEAM
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.

| 0 | 1 | 3 | 5 | 7 | 9 | 11 | |
|---|---|---|---|---|---|---|---|
| XS | XS | S | S | M | L | XL | |
| A | Bust | 31 | 33 | 34 | 35 | 36-37 | 38-39 | 39-40 |
| B | Sleeve | 28 | 29 | 29 | 30 | 30-31 | 31-311/2 | 31-311/2 |
| C | Waist | 231/2-241/2 | 241/2-251/2 | 251/2-261/2 | 261/2-271/2 | 28-29 | 291/2-301/2 | 31-32 |
| D | Hip | 34-35 | 35-36 | 36-37 | 37-38 | 38-39 | 391/2-401/2 | 41-42 |
| E | Inseam | 29 | 29 | 291/2 | 291/2 | 30 | 30 | 301/2 |
BUST
With a tape measure, hold it level and measure around the fullest part of the chest, under the arms and around the shoulder blades.
SLEEVE
With elbow slightly bent, measure from the center behind the neck, over the point of the shoulder, around the elbow and down the wrist.
WAIST
With a tape measure, hold it level and measure the circumference at the waist's natural bend.
HIP
With the tape measure, hold it level and legs straight. Measure the circumference at the fullest point.
INSEAM
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.

| 6 (w22) | 7 (w23) | 8 (w24) | 10 (w25) | 12 (w26) | 14 (w27) | 16 (w28) | 18 (w29) | 20 (w30) | |
|---|---|---|---|---|---|---|---|---|---|
| S | S | S | M | M | L | L | XL | XL | |
| A | Chest | 24-25 | 25-26 | 26-27 | 27-28 | 28-29 | 29-30 | 31-32 | 32-33 | 33-34 |
| B | Waist | 22-23 | 23-24 | 24-25 | 25-26 | 26-27 | 27-28 | 28-29 | 29-30 | 30-31 |
| C | Inseam | 20-21 | 21-22 | 22-23 | 23-24 | 241/2-251/2 | 251/2-261/2 | 261/2-27 | 27-271/2 | 271/2-28 |
| D | Height | 46-47 | 48-49 | 51-53 | 54-56 | 57-59 | 60-62 | 63-64 | 65-66 | 66-67 |
CHEST
With a tape measure, hold it level and measure around the fullest part of the chest, under the arms and around the shoulder blades.
WAIST
With a tape measure, hold it level and measure the circumference at the waist's natural bend.
HIP
With the tape measure, hold it level and legs straight. Measure the circumference at the fullest point.
INSEAM
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.
| 4 | 5 | 6 | 7 | |
|---|---|---|---|---|
| S | M | L | L | |
| Chest | 22-23 | 23-24 | 24-241/2 | 241/2-25 |
| Waist | 21-211/2 | 211/2-22 | 22-221/2 | 221/2-23 |
| Inseam | 17-18 | 18-19 | 19-20 | 20-201/2 |
| Height | 39-41 | 42-44 | 45-46 | 47-48 |
| S | M | L | |
|---|---|---|---|
| Age | 2 | 3 | 4 |

| US | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 |
| EU | 37.5 | 38 | 38.5 | 39 | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 45.5 | 46 | 47.5 |
| UK | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 12 |

| S | M | L | XL | XXL | XXXL | |
|---|---|---|---|---|---|---|
| A | Chest | 33-35 | 36-39 | 40-42 | 43-46 | 47-50 | 51-56 |
| B | Sleeve | 32 - 32 1/2 | 33 - 33 1/2 | 33 1/2 - 34 | 34 1/2 - 35 | 35 1/2 - 36 | 36 |
CHEST
With a tape measure, hold it level and measure around the fullest part of the chest, under the arms and around the shoulder blades.
SLEEVE
With elbow slightly bent, measure from the center behind the neck, over the point of the shoulder, around the elbow and down the wrist.

MEN'S PANTS
| 28 | 30 | 32 | 34 | 36 | 38 | 40 | |
|---|---|---|---|---|---|---|---|
| A | Waist | 27-29 | 29-31 | 31-33 | 33-35 | 35-37 | 37-39 | 39-41 |
| B | INSEAM | 30 | 30 - 30 1/2 | 30 1/2 - 31 | 31 - 31 1/2 | 31 1/2 - 32 | 32 - 32 1/2 | 32 - 32 1/2 |
INSEAM
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.
WAIST
With a tape measure, hold it level and measure the circumference at the waist's natural bend.

WOMEN'S PANTS
| 1/2 | 3/4 | 5/6 | 7/8 | 9/10 | 11/12 | 13/14 | |
|---|---|---|---|---|---|---|---|
| A | Waist | 25 | 26 | 27 | 28 1/2 | 30 | 31 1/2 | 33 |
| B | INSEAM | 29 | 29 1/2 | 29 1/2 | 30 | 30 | 30 1/2 | 30 1/2 |
| C | HIP | 35 | 36 | 37 | 38 1/2 | 40 | 41 1/2 | 43 |
WAIST
With a tape measure, hold it level and measure the circumference at the waist's natural bend.
INSEAM
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.
HIP
With the tape measure, hold it level and legs straight. Measure the circumference at the fullest point.

YOUTH PANTS
| 4 | 5 | 6 (w22) | 8 (w24) | 10 (w26) | 12 (w28) | |
|---|---|---|---|---|---|---|
| A | Waist | 21 | 21 1/2 | 23 | 24 | 26 | 28 |
| B | HEIGHT | 39-41 | 42-44 | 47-48 | 50-52 | 54-56 | 58-60 |
INSEAM
While standing without shoes and with feet slightly apart, measure from the crotch along the leg to the floor.
YOUTH WAIST
With a tape measure, hold it level and measure the circumference at the waist's natural bend.
* Measure the circumferenceHELMETS
With tape measure level, measure the widest point of your head, approximately 1" above your eyebrows.
MX14 HELMETS
| XS | S | M | L | XL | XXL | |
|---|---|---|---|---|---|---|
| 20 7/8 - 21 1/4 | 21 5/8 - 22 | 22 1/5 - 22 7/8 | 23 1/4 - 23 5/8 | 24 - 24 3/8 | 24 5/8 - 25 1/8 | |
| Hat Size | 6 5/8 - 6 3/4 | 6 7/8 - 7 | 7 1/8 - 7 1/4 | 7 3/8 - 7 1/2 | 7 5/8 - 7 3/4 | 7 7/8 - 8 |
MEN'S HELMETS
| XS | S | M | L | XL | XXL | |
|---|---|---|---|---|---|---|
| 20 7/8 - 21 1/4 | 21 1/4 - 22 1/8 | 22 3/8 - 23 1/8 | 23 1/4 - 23 3/4 | 23 1/8 - 24 3/4 | 24 1/8 - 25 3/4 | |
| Hat Size | 6 5/8 - 6 7/8 | 6 7/8 - 7 1/8 | 7 1/8 - 7 3/8 | 7 3/8 - 7 5/8 | 7 5/8 - 7 7/8 | 7 7/8 - 8 1/4 |
YOUTH HELMETS
| YS | YM | YL | L | |
|---|---|---|---|---|
| 18 1/2 - 18 7/8 | 19 1/4 - 19 3/4 | 20 - 20 1/2 | ||
| Hat Size | 5 7/8 - 6 | 6 1/8 - 6 1/4 | 6 3/8 - 6 1/2 |
V3R / Rampage
| S | M | L | XL |
|---|---|---|---|
| 21 1/4 - 22 1/8 | 22 3/8 - 23 1/8 | 23 1/4 - 23 3/4 | 23 7/8 - 24 3/4 |

SOCKS
| S | M | L |
|---|---|---|
| 6 - 8 | 8 - 10 | 10 - 13 |
* Use your regular shoe size as a reference for all sock sizing.
COMP 5
| 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | |
|---|---|---|---|---|---|---|---|---|
| Measure | 9.9375 | 10.25 | 10.5625 | 10.9375 | 11.25 | 11.5625 | 11.875 | 12.1875 |
BOOTS MEASUREMENT
Use your regular shoe size as a reference. Boots are in Men's or Boy's sizes. If you are following the measurements, use a regular ruler. Make sure you are standing, wearing the socks you will wear with your new shoes or boots. Then convert the measurement to your shoe size using the above chart. Measurements are a guidline and do not guarantee the proper fit. Note, Fox boots are only offered in whole shoe sizes, so take this into consideration when using the measurement chart.
F3R BOOT
| 8 | 9 | 10 | 11 | 12 | 13 | 14 | |
|---|---|---|---|---|---|---|---|
| Measure | 9.9375 | 10.25 | 10.5625 | 10.9375 | 11.25 | 11.5625 | 11.875 |
WOMEN'S BOOTS
| 5 | 6 | 7 | 8 | 9 | 10 | 11 | |
|---|---|---|---|---|---|---|---|
| Measure | 8.5 | 8.875 | 9.25 | 9.5 | 9.875 | 10.1875 | 10.5 |
YOUTH COMP 5
| Y1 | Y2 | Y3 | Y4 | Y5 | Y6 | Y7 | Y8 | |
|---|---|---|---|---|---|---|---|---|
| Measure | 7.75 | 8.125 | 8.5 | 8.75 | 9.125 | 9.5 | 9.75 | 9.9375 |
KID'S COMP 5
| k10 | k11 | k12 | k13 | |
|---|---|---|---|---|
| Measure | 6.5 | 6.75 | 7.125 | 7.5 |

* Measure hand circumference without thumbMEN'S GLOVES
| S (8) | M (9) | L (10) | XL (11) | XXL (12) | XXXL (13) | XXXXL (14) |
|---|---|---|---|---|---|---|
| 7 1/8 - 7 3/8 | 7 3/8 - 7 5/8 | 7 5/8 - 7 7/8 | 7 7/8 - 8 1/8 | 8 1/8 - 8 3/8 | 8 3/8 - 8 5/8 | 8 5/8 - 8 7/8 |
WOMEN'S GLOVES
| S (8) | M (9) | L (10) | XL (11) |
|---|---|---|---|
| 6 5/8 - 6 7/8 | 6 7/8 - 7 1/8 | 7 1/8 - 7 3/8 | 7 3/8 - 7 5/8 |
HAND LENGTH
Hand measure should be taken from the wrist to the end of the middle finger. If right-handed be sure to use right hand.

| S | M | L | XL | XXL | XXXL | |
|---|---|---|---|---|---|---|
| A | Chest | 34-35 | 36-38 | 40-42 | 44-46 | 48-50 | 52-54 |
| B | Sleeve | 31 1/2 - 32 1/2 | 32 1/2 - 33 1/2 | 33 1/2 - 34 1/2 | 34 1/2 - 35 1/2 | 35 1/2 - 36 1/2 | 35 1/2 - 36 1/2 |
| C | Waist | 28-30 | 31-33 | 34-36 | 38-40 | 42-44 | 46-48 |
CHEST
With a tape measure, hold it level and measure around the fullest part of the chest, under the arms and around the shoulder blades.
CENTER BACK SLEEVE
With elbow slightly bent, measure from the center behind the neck, over the point of the shoulder, around the elbow and down the wrist.
WAIST
With a tape measure, hold it level and measure the circumference at the waist's natural bend.

ELBOW GUARDS MEASUREMENTS
| Small/Medium | Large/X-Large | |
|---|---|---|
| A | 11" / 28cm | 13" / 30cm |
| B | 8.5" / 22cm | 9" / 23cm |
| C | N/A | N/A |
A = Measure the circumference 6 inches Above Elbow Center
B = Measure the circumference 4 inches Below Elbow Center
C = Measure the circumference from center of wrist

KNEE GUARDS MEASUREMENTS
| Small/Medium | Large/X-Large | |
|---|---|---|
| A | 15-16" / 39-41cm | 17-18" / 43-46cm |
| B | 12.5"-13" / 32cm-33cm | 14"-15" / 36-38cm |
| C | N/A | N/A |
A = Measure the circumference 4 inches Above Knee Center
B = Measure the circumference 4 inches Below Knee Center
C = Length of Pad
HELMETS
With tape measure level, measure the widest point of your head, approximately 1" above your eyebrows.
| X-Small | Small | Medium | Large | X-Large | XX-Large | |
|---|---|---|---|---|---|---|
| 20 7/8 - 21 1/4 | 21 1/4 - 22 1/8 | 22 3/8 - 23 1/8 | 23 1/4 - 23 3/4 | 23 1/8 - 24 3/4 | 24 1/8 - 25 3/4 | |
| Hat Size | 6 5/8 - 6 7/8 | 6 7/8 - 7 1/8 | 7 1/8 - 7 3/8 | 7 3/8 - 7 5/8 | 7 5/8 - 7 7/8 | 7 7/8 - 8 1/4 |
* Sizing information is provided by the manufacturer and does not guarantee a perfect fit.
