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FLO Locking Chuck

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FLO Air Gage Info

The FLO Locking Chuck is a specially designed device that locks on to a Presta valve to prevent air loss during inflation. The FLO Locking Chuck features an innovative dial design that creates a precision lock and a unique trigger grip allowing for a quick release without air loss. 



The FLO Locking Chuck is plastic free and made from a combination of steel, aluminum and rubber.



Thread the FLO Locking Chuck onto any Schrader style pump to make inflation a breeze. 


Why We Made This:
We designed the FLO Locking Chuck due to many frustrations with existing chucks when developing the FLO Air Gauge.

FLO Locking Chuck
Valve Style Presta
Pump Compatibility Schrader Hoses
Materials Steel, Rubber
Locking Type Precision Dial
Removal Trigger Grip

Getting Started

To learn how to use your FLO Locking Chuck please watch the video below. 

 

Maintenance

Check the FLO Locking Chuck for seal wear every 6 months. All parts are replaceable.

Optimize your tire pressure for your weight, riding surface, tire casing width, and internal rim width by using the tire pressure recommendation table below. The pressures listed are starting recommendations. We suggest experimenting with your tire pressure to find what is the fastest for you and the roads you ride. Remember, being slightly lower is better than being slightly higher.

 

Follow these steps to use the table:

 

  • Weigh yourself and your bike together.
  • Find your wheel model.
  • Determine your riding surface. This will be a pavement or gravel variant.
  • Measure the width of your inflated tire on your rim.
  • Find your tire width under your road surface type.
  • Match your riding surface and tire width to your bike and rider weight.
  • Use this pressure (psi) and enjoy your ride!
Bike + Rider Weight (lbs) Bike + Rider Weight (kg) Recommended Tire Pressure (psi)
Wheel Model
FLO 49 AS, FLO 64 AS, FLO 77 AS
21mm Internal Rim Width
Wheel Model
FLO G700, FLO G650
25mm Internal Rim Width
Smooth Pavement Medium Pavement Rough Pavement Packed Gravel Packed Gravel Course Gravel Pavement
25-27mm
Tire
28-30mm
Tire
32-35mm
Tire
25-27mm
Tire
28-30mm
Tire
32-35mm
Tire
25-27mm
Tire
28-30mm
Tire
32-35mm
Tire
25-27mm
Tire
28-30mm
Tire
32-35mm
Tire
32-35mm
Tire
37-40mm
Tire
42-45mm
Tire
47-50mm
Tire
32-35mm
Tire
37-40mm
Tire
42-45mm
Tire
47-50mm
Tire
32-35mm
Tire
37-40mm
Tire
42-45mm
Tire
47-50mm
Tire
100 45 80.0 75.0 70.0 76.0 71.0 66.0 70.0 65.0 62.0 60.0 55.0 52.0 46.0 35.0 29.0 24.0 42.0 32.0 26.0 20.0 58.0 40.0 33.0 28.0
110 50 81.0 76.0 71.0 77.0 72.0 67.0 70.9 65.9 62.9 60.8 55.8 52.8 46.8 35.8 29.8 24.8 42.7 32.7 26.7 20.7 59.0 41.0 34.0 29.0
120 54 82.0 77.0 72.0 77.9 72.9 67.9 71.8 66.8 63.8 61.5 56.5 53.5 47.5 36.5 30.5 25.5 43.3 33.3 27.3 21.3 59.9 41.9 34.9 29.9
130 59 83.0 78.0 73.0 78.9 73.9 68.9 72.7 67.7 64.7 62.3 57.3 54.3 48.3 37.3 31.3 26.3 44.0 34.0 28.0 22.0 60.9 42.9 35.9 30.9
140 64 84.0 79.0 74.0 79.8 74.8 69.8 73.6 68.6 65.6 63.0 58.0 55.0 49.0 38.0 32.0 27.0 44.6 34.6 28.6 22.6 61.8 43.8 36.8 31.8
150 68 85.0 80.0 75.0 80.8 75.8 70.8 74.5 69.5 66.5 63.8 58.8 55.8 49.8 38.8 32.8 27.8 45.3 35.3 29.3 23.3 62.8 44.8 37.8 32.8
160 73 86.0 81.0 76.0 81.7 76.7 71.7 75.4 70.4 67.4 64.5 59.5 56.5 50.5 39.5 33.5 28.5 45.9 35.9 29.9 23.9 63.7 45.7 38.7 33.7
170 77 87.0 82.0 77.0 82.7 77.7 72.7 76.3 71.3 68.3 65.3 60.3 57.3 51.3 40.3 34.3 29.3 46.6 36.6 30.6 24.6 64.7 46.7 39.7 34.7
180 82 88.0 83.0 78.0 83.6 78.6 73.6 77.2 72.2 69.2 66.0 61.0 58.0 52.0 41.0 35.0 30.0 47.2 37.2 31.2 25.2 65.6 47.6 40.6 35.6
190 86 89.0 84.0 79.0 84.6 79.6 74.6 78.1 73.1 70.1 66.8 61.8 58.8 52.8 41.8 35.8 30.8 47.9 37.9 31.9 25.9 66.6 48.6 41.6 36.6
200 91 90.0 85.0 80.0 85.5 80.5 75.5 79.0 74.0 71.0 67.5 62.5 59.5 53.5 42.5 36.5 31.5 48.5 38.5 32.5 26.5 67.5 49.5 42.5 37.5
210 95 91.0 86.0 81.0 86.5 81.5 76.5 79.9 74.9 71.9 68.3 63.3 60.3 54.3 43.3 37.3 32.3 49.2 39.2 33.2 27.2 68.5 50.5 43.5 38.5
220 100 92.0 87.0 82.0 87.4 82.4 77.4 80.8 75.8 72.8 69.0 64.0 61.0 55.0 44.0 38.0 33.0 49.8 39.8 33.8 27.8 69.4 51.4 44.4 39.4
230 104 93.0 88.0 83.0 88.4 83.4 78.4 81.7 76.7 73.7 69.8 64.8 61.8 55.8 44.8 38.8 33.8 50.5 40.5 34.5 28.5 70.4 52.4 45.4 40.4
240 109 94.0 89.0 84.0 89.3 84.3 79.3 82.6 77.6 74.6 70.5 65.5 62.5 56.5 45.5 39.5 34.5 51.1 41.1 35.1 29.1 71.3 53.3 46.3 41.3
250 113 95.0 90.0 85.0 90.3 85.3 80.3 83.5 78.5 75.5 71.3 66.3 63.3 57.3 46.3 40.3 35.3 51.8 41.8 35.8 29.8 72.3 54.3 47.3 42.3
260 118 96.0 91.0 86.0 91.2 86.2 81.2 84.4 79.4 76.4 72.0 67.0 64.0 58.0 47.0 41.0 36.0 52.4 42.4 36.4 30.4 73.2 55.2 48.2 43.2
270 122 97.0 92.0 87.0 92.2 87.2 82.2 85.3 80.3 77.3 72.8 67.8 64.8 58.8 47.8 41.8 36.8 53.1 43.1 37.1 31.1 74.2 56.2 49.2 44.2

Optimize your tire pressure for your weight, riding surface, tire casing width, and internal rim width by using the tire pressure recommendation tables below. The pressures listed are starting recommendations. We suggest experimenting with your tire pressure to find what is the fastest for you and the roads you ride. Remember, being slightly lower is better than being slightly higher.

Follow these steps to use the table:

 

  • Weigh yourself and your bike together.
  • Find your wheel model.
  • Determine your riding surface. This will be a pavement or gravel variant.
  • Measure the width of your inflated tire on your rim.
  • Find your tire width under your road surface type.
  • Match your riding surface and tire width to your bike and rider weight.
  • Use this pressure (psi) and enjoy your ride!
Bike + Rider Weight (lbs) Bike + Rider Weight (kg) Recommended Tire Pressure (psi)
Wheel Model
FLO 49 AS, FLO 64 AS, FLO 77 AS
21mm Internal Rim Width
Smooth Pavement Medium Pavement Rough Pavement Packed Gravel
25-27mm
Tire
28-30mm
Tire
32-35mm
Tire
25-27mm
Tire
28-30mm
Tire
32-35mm
Tire
25-27mm
Tire
28-30mm
Tire
32-35mm
Tire
25-27mm
Tire
28-30mm
Tire
32-35mm
Tire
100 45 80.0 75.0 70.0 76.0 71.0 66.0 70.0 65.0 62.0 60.0 55.0 52.0
110 50 81.0 76.0 71.0 77.0 72.0 67.0 70.9 65.9 62.9 60.8 55.8 52.8
120 54 82.0 77.0 72.0 77.9 72.9 67.9 71.8 66.8 63.8 61.5 56.5 53.5
130 59 83.0 78.0 73.0 78.9 73.9 68.9 72.7 67.7 64.7 62.3 57.3 54.3
140 64 84.0 79.0 74.0 79.8 74.8 69.8 73.6 68.6 65.6 63.0 58.0 55.0
150 68 85.0 80.0 75.0 80.8 75.8 70.8 74.5 69.5 66.5 63.8 58.8 55.8
160 73 86.0 81.0 76.0 81.7 76.7 71.7 75.4 70.4 67.4 64.5 59.5 56.5
170 77 87.0 82.0 77.0 82.7 77.7 72.7 76.3 71.3 68.3 65.3 60.3 57.3
180 82 88.0 83.0 78.0 83.6 78.6 73.6 77.2 72.2 69.2 66.0 61.0 58.0
190 86 89.0 84.0 79.0 84.6 79.6 74.6 78.1 73.1 70.1 66.8 61.8 58.8
200 91 90.0 85.0 80.0 85.5 80.5 75.5 79.0 74.0 71.0 67.5 62.5 59.5
210 95 91.0 86.0 81.0 86.5 81.5 76.5 79.9 74.9 71.9 68.3 63.3 60.3
220 100 92.0 87.0 82.0 87.4 82.4 77.4 80.8 75.8 72.8 69.0 64.0 61.0
230 104 93.0 88.0 83.0 88.4 83.4 78.4 81.7 76.7 73.7 69.8 64.8 61.8
240 109 94.0 89.0 84.0 89.3 84.3 79.3 82.6 77.6 74.6 70.5 65.5 62.5
250 113 95.0 90.0 85.0 90.3 85.3 80.3 83.5 78.5 75.5 71.3 66.3 63.3
260 118 96.0 91.0 86.0 91.2 86.2 81.2 84.4 79.4 76.4 72.0 67.0 64.0
270 122 97.0 92.0 87.0 92.2 87.2 82.2 85.3 80.3 77.3 72.8 67.8 64.8
Bike + Rider Weight (lbs) Bike + Rider Weight (kg) Recommended Tire Pressure (psi)
Wheel Model
FLO G700, FLO G650
25mm Internal Rim Width
Packed Gravel Course Gravel Pavement
32-35mm
Tire
37-40mm
Tire
42-45mm
Tire
47-50mm
Tire
32-35mm
Tire
37-40mm
Tire
42-45mm
Tire
47-50mm
Tire
32-35mm
Tire
37-40mm
Tire
42-45mm
Tire
47-50mm
Tire
100 45 46.0 35.0 29.0 24.0 42.0 32.0 26.0 20.0 58.0 33.0 33.0 28.0
110 50 46.8 35.8 29.8 24.8 42.7 32.7 26.7 20.7 59.0 34.0 34.0 29.0
120 54 47.5 36.5 30.5 25.5 43.3 33.3 27.3 21.3 59.9 34.9 34.9 29.9
130 59 48.3 37.3 31.3 26.3 44.0 34.0 28.0 22.0 60.9 35.9 35.9 30.9
140 64 49.0 38.0 32.0 27.0 44.6 34.6 28.6 22.6 61.8 36.8 36.8 31.8
150 68 49.8 38.8 32.8 27.8 45.3 35.3 29.3 23.3 62.8 37.8 37.8 32.8
160 73 50.5 39.5 33.5 28.5 45.9 35.9 29.9 23.9 63.7 38.7 38.7 33.7
170 77 51.3 40.3 34.3 29.3 46.6 36.6 30.6 24.6 64.7 39.7 39.7 34.7
180 82 52.0 41.0 35.0 30.0 47.2 37.2 31.2 25.2 65.6 40.6 40.6 35.6
190 86 52.8 41.8 35.8 30.8 47.9 37.9 31.9 25.9 66.6 41.6 41.6 36.6
200 91 53.5 42.5 36.5 31.5 48.5 38.5 32.5 26.5 67.5 42.5 42.5 37.5
210 95 54.3 43.3 37.3 32.3 49.2 39.2 33.2 27.2 68.5 43.5 43.5 38.5
220 100 55.0 44.0 38.0 33.0 49.8 39.8 33.8 27.8 69.4 44.4 44.4 39.4
230 104 55.8 44.8 38.8 33.8 50.5 40.5 34.5 28.5 70.4 45.4 45.4 40.4
240 109 56.5 45.5 39.5 34.5 51.1 41.1 35.1 29.1 71.3 46.3 46.3 41.3
250 113 57.3 46.3 40.3 35.3 51.8 41.8 35.8 29.8 72.3 47.3 47.3 42.3
260 118 58.0 47.0 41.0 36.0 52.4 42.4 36.4 30.4 73.2 48.2 48.2 43.2
270 122 58.8 47.8 41.8 36.8 53.1 43.1 37.1 31.1 74.2 49.2 49.2 44.2

Warranty Info

All FLO Locking Chuck ship with a 2-year limited warranty. We want you to feel comfortable with your purchase. Please contact us if you have any issues with your FLO Locking Chuck. If your FLO Locking Chuck has material defects or issues with the workmanship we will take care of the problem. Issues such as misuse are not covered under warranty. In the event you damage your FLO Locking Chuck outside of warranty, please reach out to us as we can normally find a way to get you back on the track.


You can review our complete warranty here

 

Shipping Info

 

USA

Standard Shipping: Ships in 1-3 Business Days. Delivers 2-7 Days After Shipment

USPS Priority Mail: Ships in 1-3 Business Days. Delivers 1-3 Days After Shipment

USPS Priority Mail Express: Ships in 1-3 Business Days. Delivers Overnight

International

Priority Mail International: Ships in 1-3 Business Days. Delivers 10-14 Days After Shipment

Priority Mail Express International: Ships in 1-3 Business Days. Delivers 5-10 Days After Shipment

 

Australia & Singapore

Priority Mail International: Ships in 1-3 Business Days. Delivers 10-14 Days After Shipment

Priority Mail Express International: Ships in 1-3 Business Days. Delivers 5-10 Days After Shipment

 

Import/Export

You are responsible to pay any import taxes or duties when importing FLO wheels from the USA. Please contact us for estimates.

How To use FLO Locking CHuck

Listen and learn

Introducing the FLO Air Gage - Set Accurate Tire Pressures

Watt Points = 9

Learn all about the FLO Air Gage and how years of research and a key frustration led to it's design and release. Learn all about pumps, gages, and the importance of setting accurate tire pressures to optiimize your speed. When your tire pressure is too high, you lose 1 watt for every 1 psi of over inflation. Finally, find your best tire pressure and how to set it with the FLO Air Gage.

All About Rolling Resistance, Impedance, & More

Watt Points = 50-100

Everything you need to know about rolling resistance. We describe, how to imporve it, tire selection & sizing, why FLO wheels have been optimized for rolling resistance, pressure management, and more. We also discuss how FLO has studied and contributed to rolling resistance and some of the things we are working on here to learn more.

NO PLASTIC parts

The FLO Locking Chuck is free from plastics. The simple design makes use and service easy. The FLO Locking Chuck is made from steel, aluminum, and rubber for a long lasting chuck that you can hand down to the next generation. Go ahead and take a look, we've got nothing to hide.

CUSTOMER REVIEWS

What’s in the Box

Top Reasons

Flo Promise

Every FLO product is designed and engineered to make you faster but sold at an affordable price. With every purchase, a portion goes back to inspire future generations of cyclists through our Bike for a Kid program and help our planet through our One Wheel One Tree initiative. Most importantly, we are committed to you, the customer. We’ll meet you where you are on your journey, whether you’re a first time rider or a pro. We are here to provide you support. Save money, feel good, and become faster.

Co-Founder & CEO - Jon Thornham

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