Thule Rail 8L - Hydration Backpack
The Rail Bike Hydration rucksack from the quality brand Thule has the ReTrakt drinking system and has a secure fit that prevents the rucksack from moving during an intensive mountain bike ride. The ReTrakt drinking system is equipped with a magnetic strip, which means that the hose will store itself after use. The 2.5 L HydraPak reservoir has a handy sliding opening, making it easy to clean. The drinking spout is provided with a sealing mechanism, which prevents leaks. Thanks to the optimum weight distribution you also use less muscle power. The handy loops can be used to attach pads, a helmet, and a chin guard. Food, clothing, and other items can be accessed quickly during your bike ride without having to take the bag off. Tools, pumps, snacks, or anything else you want to take with you can be conveniently stored in one of the handy compartments. The reflective details ensure good visibility in underexposed situations.
The Rail Bike Hydration rucksack from the quality brand Thule has the ReTrakt drinking system and has a secure fit that prevents the rucksack from moving during an intensive mountain bike ride. The ReTrakt drinking system is equipped with a magnetic strip, which means that the hose will store itself after use. The 2.5 L HydraPak reservoir has a handy sliding opening, making it easy to clean. The drinking spout is provided with a sealing mechanism, which prevents leaks. Thanks to the optimum weight distribution you also use less muscle power. The handy loops can be used to attach pads, a helmet, and a chin guard. Food, clothing, and other items can be accessed quickly during your bike ride without having to take the bag off. Tools, pumps, snacks, or anything else you want to take with you can be conveniently stored in one of the handy compartments. The reflective details ensure good visibility in underexposed situations.
The Rail Bike Hydration rucksack from the quality brand Thule has the ReTrakt drinking system and has a secure fit that prevents the rucksack from moving during an intensive mountain bike ride. The ReTrakt drinking system is equipped with a magnetic strip, which means that the hose will store itself after use. The 2.5 L HydraPak reservoir has a handy sliding opening, making it easy to clean. The drinking spout is provided with a sealing mechanism, which prevents leaks. Thanks to the optimum weight distribution you also use less muscle power. The handy loops can be used to attach pads, a helmet, and a chin guard. Food, clothing, and other items can be accessed quickly during your bike ride without having to take the bag off. Tools, pumps, snacks, or anything else you want to take with you can be conveniently stored in one of the handy compartments. The reflective details ensure good visibility in underexposed situations.
The Rail Bike Hydration rucksack from the quality brand Thule has the ReTrakt drinking system and has a secure fit that prevents the rucksack from moving during an intensive mountain bike ride. The ReTrakt drinking system is equipped with a magnetic strip, which means that the hose will store itself after use. The 2.5 L HydraPak reservoir has a handy sliding opening, making it easy to clean. The drinking spout is provided with a sealing mechanism, which prevents leaks. Thanks to the optimum weight distribution you also use less muscle power. The handy loops can be used to attach pads, a helmet, and a chin guard. Food, clothing, and other items can be accessed quickly during your bike ride without having to take the bag off. Tools, pumps, snacks, or anything else you want to take with you can be conveniently stored in one of the handy compartments. The reflective details ensure good visibility in underexposed situations.
in 5 offers
The lowest price for Thule Rail 8L - Hydration Backpack right now is $79.95 at Dyson Bikes, compared across 5 retailers.
The all-time low was $79.95 on 7 Sept 2026. That's the lowest price we've ever tracked — a great time to buy.
Prices last updated 7 Sept 2026.
Last updated at 07/09/2026 00:38:12
Thule Rail Bike H2O Pack 8L Hydration Backpack Obsidian - 3203795
Delivery between 10–15 Sept $17.90
Thule Rail 8L 3203795
Delivery between 9–17 Sept $9.50
Thule Rail Bike Hydration Pack 8L Obsidian
Free 30-day returns
Thule Rail Hydration Pack
Delivery between 13–16 Sept $29
Thule Rail Hydration Pack
Delivery $49.20
originally posted on thule.com
Best hydration pack on the market . Instantly loved it when trying for the first time . Doesnt move aroun when you ride . It also looms really cool got compliments on it and asked where did I get it .
originally posted on moosejaw.com
The size and comfort of this pack is unmatched and second to none. It is easy to fill the bladder and fits securely into a separate sleeve. Weight is nicely balanced while on use and isn't top heavy like many backpacks. Has compartments for plenty of tools and gadgets. The shape is nice and slim, while structured as not to become saggy and wide like other backpacks. Overall, well built and worth the price.
originally posted on thule.com
For a long time now I've been using bladders that impart no taste or smell to the water. Why would Thule use a bladder from 20 years ago ? I often leave the same water in my bladder for a week or two with no change in taste. Drinking from the Thule bladder is rather nasty immediately !
| Dimensions | 18 x 16 x 42 cm |
| Volume | 8 L |
| Reservoir capacity | 2.5 L |
| Shipped Nationally | Yes |
Thule Rail Bike H2O Pack 8L Hydration Backpack Obsidian - 3203795
Delivery between 10–15 Sept $17.90
Thule Rail 8L 3203795
Delivery between 9–17 Sept $9.50
Thule Rail Bike Hydration Pack 8L Obsidian
Free 30-day returns
Thule Rail Hydration Pack
Delivery between 13–16 Sept $29
Thule Rail Hydration Pack
Delivery $49.20
Best hydration pack on the market . Instantly loved it when trying for the first time . Doesnt move aroun when you ride . It also looms really cool got compliments on it and asked where did I get it .
The size and comfort of this pack is unmatched and second to none. It is easy to fill the bladder and fits securely into a separate sleeve. Weight is nicely balanced while on use and isn't top heavy like many backpacks. Has compartments for plenty of tools and gadgets. The shape is nice and slim, while structured as not to become saggy and wide like other backpacks. Overall, well built and worth the price.
For a long time now I've been using bladders that impart no taste or smell to the water. Why would Thule use a bladder from 20 years ago ? I often leave the same water in my bladder for a week or two with no change in taste. Drinking from the Thule bladder is rather nasty immediately !
I love this pack. Bought it for some challenging, all-day hikes in Colorado. One day, after 8+ miles, I still had plenty of water to spare - and I was hydrating often! The fit is great (adjustable) and plenty of smart compartments make it easy to pack a good amount of stuff and remain organized. I'm happy with the color, too. No true flaws here - the adjustable straps always take me a few tries to go in the right direction, which I think is more user error than anything :)
So far after purchasing things I’ve noticed on this bad is the intentionality of each design feature it has. Thule did great with giving enough pockets without just throwing pockets all over the things. You’ve got enough storage for tools, pump, and whatever else you may need…wallet, keys, phone. Strap management is absolutely superb as well. Almost ever strap adjustment you make has a way to wrap them up so they don’t flop around. I love the magnetic tub. Bag feels durable. Most of all it’s super planted and doesn’t feel sloppy on my back when hitting jumps or tech sections. Only down side is since it is a fairly large bag I did notice my back sweating pretty good. Understandable though! Ventilated enough that it was an uncomfortable soup kitchen back there, ... MoreSo far after purchasing things I’ve noticed on this bad is the intentionality of each design feature it has. Thule did great with giving enough pockets without just throwing pockets all over the things. You’ve got enough storage for tools, pump, and whatever else you may need…wallet, keys, phone. Strap management is absolutely superb as well. Almost ever strap adjustment you make has a way to wrap them up so they don’t flop around. I love the magnetic tub. Bag feels durable. Most of all it’s super planted and doesn’t feel sloppy on my back when hitting jumps or tech sections. Only down side is since it is a fairly large bag I did notice my back sweating pretty good. Understandable though! Ventilated enough that it was an uncomfortable soup kitchen back there, granted I don’t really sweat much and the temps were mild, so that opinion could change in 80 degree weather. Camel sack does have a slight plastic taste, but it’s so early in owning this I don’t know how long it will linger. Hopefully it goes away after a few uses. All in all it’s a solid bag, and better than any of the others I’ve tried on.
I have a hip pack for shorter rides but this is great for longer trips where I want to carry more. I found the adjustability on the height of the chest strap useful for getting the fit right.
The retrak sistems amazing. . Does move around Riding. Only area of improvement would be if the water bag detached from the hose to fill.
Found it challenging to organize the strap ends as there are a few and each uses a slightly different method. Very clean looking backpack except for the strap ends
Very impressed of the quality, built with high-end components, and the fit (for me at least) is perfect! I will probably use it while ski touring in late spring conditions. Have everything I wan't for those occasions, and for mtb of course!
This checks all the boxes… back protection, holding lots of water, lots of storage (expansive), comfortable. The only small item I wish for was storage for the waistline strap (for times it’s not in use). Otherwise just what I was looking for over all.
| Dimensions | 18 x 16 x 42 cm |
| Volume | 8 L |
| Reservoir capacity | 2.5 L |
| Shipped Nationally | Yes |
