Cycle Saver Barricade ($23)
https://www.personalsavers.com/product/barricade-pepper-spray-for-bicycles-cyclist-mountain-biking/
$4 replacements: https://www.personalsavers.com/product/lifetime-can-replacements-3oz-and-4oz-pepper-spray-cans
You get cheap lifetime can replacements if you registered your product within 14 days of your purchase.
The pepper spray can we use, it's a 4 oz can and measures 5.85 inches in length and 1.35 inches in width. The mounting bracket its 3.5 inches in length.
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Scat Bear Spray Belt
https://scatbelt.com/collections/2019/products/the-cub-silver-black
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https://www.personalsavers.com/product/cycle-saver-pepper-spray-for-bicycles-cyclist/
https://www.amazon.com/Cycle-Saver-Install-Bicycles-Mountain/dp/B077XJTS1B
Small: Fits bars up to 26mm in diameter / 81.7mm in circumference
Large: Fits bars or seat post from 27.2mm to 37.5mm in diameter / 85.5mm to 117.5mm in circumference
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https://www.sabrered.com/pepper-spray/cyclist-pepper-spray-adjustable-bike-strap
SABRE Cyclist Pepper Spray with Adjustable Bike Strap Velcro strap; 4.7” T; 1” W; 1” D; 45 bursts (5X the competition) helps to protect against multiple threats and a 10-foot (3 meter) spray range
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https://www.amazon.com/Pepper-Spray-Bike-Mount-stem/dp/B00LBAJGL2
This Bike Holster will fit 1.5 - 4 oz. pepper spray containers.
The mount is 6 3/4 in length, adjustable and designed for the bike stem.