Bike Mobile Phone Holder BTR Bag. Waterproof Bicycle Frame Bag Gen4

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In stock and despatched within 1 Working Day.

Bike Frame Bag with Mobile Phone Pocket Gen4

+ Sunvisor

Our Editor says "Buy the Gen4 Frame Bike Bag if you want a bag with 5 straps, subtle reflective stripes & design & water resistant material!"

Create extra secure, safe & dry space on your bike with our BTR Frame Bag Gen4. This bicycle frame bag has an easy access phone pocket so you can attach your phone to an external battery pack if you like to give you extra battery life.   

With Universal Fit 5 x Straps - designed so all the underneath straps fit around the cross bar or use the longer one to fasten under your frame.  The hook & loop fastening on the longest strap ensures it fits a wider variety of bike frame styles & adjusts easily.

From our BTR Bike Frame Bag Range, the Gen4 Frame Bike Bag was created in 2017 & is a popular choice for cyclists who want their belongings in easy reach and their GPS system secure on their bike.

With Built in Sun Visor 

  • Universal Fit with Five Straps in Total - to secure to your bike – Don’t take any chances… Keep it secure
    • Three Straps Underneath - to secure to your bike frame, giving you more ways to secure your bag to your crossbar.
    • Two Front Straps - to secure to the handle bar stem
    • 1 x Underneath Long Strap – ensures it fits a wider variety of bike frames.  Secure it on top of the crossbar or use the longer strap to secure under the frame
  • PVC Phone Pocket with Touch Screen Functionality – use your Phone for GPS Navigation or to Map your Ride without removing it from the PVC pocket.  See sizing for correct fit for your Smartphone
  • Easy Access Secure Phone Pocket - gives you easier access between the main storage area & phone pocket to allow easy attachment to a battery pack
  • 2 x Elasticated Luggage Straps - prevents your items moving about
  • 1 x Key Hook - so you can find your keys, fast!
  • Reflective Logo & Stripes – printed on the side. Be seen & be safe!
  • Headphone Outlet 
  • Built in Sun Visor- helps reduce reflections on your screen


Overall pocket size 18cm x 9cm
PVC window 15.5cm x 8.5cm

Ideal for iPhoneX, iPhone SE, iPhone6s, iPhone7, iPhone8, iPhone 6 Plus, 7 Plus, 8 Plus, Samsung S7, S8, S9, S7 Edge, S7 Plus, S8 Plus, S9 Plus

Please measure your mobile phone or GPS device for fit as cases can make them larger

Free Delivery & Free Returns


Delivery Information

All items are in stock and ready for immediate shipment unless otherwise specified.
All orders will be despatched the same day if ordered before 2pm (Mon-Fri)

Delivery Costs


Royal Mail 24 – FREE


Airmail (Usually Arrives Within 3-7 Days) - £3.00

Rest Of World

Airmail (Usually Arrives Within 5-10 Days) - £4.00

FREE Returns

We offer free returns within 28 days of purchase.  We will provide you with wither a Hermes or Collect + pre paid returns label. Please Contact Us with your preference or if there is another returns service you would prefer


Customer Reviews

4.5 Based on 8 reviews
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    United Kingdom

    Nifty piece of kit

    Great piece of kit and superb value for money. Brought it to take away with me on holiday where I'd arranged a bike hire. Wanted to be able to see my smartphone as unfamiliar with terrain/route. Does the job great and really spacious, could fit two energy gels,energy bar, patches, park Allen key multi tool some cash plus phone obviously and still bags of room for other bits and bobs. Bag feels of good quality and has so far put up with pounding over the lava fields in Lanzarote with out any issues for last 5 days and most Importantly always feels well secured. Speed of delivery was also impressive. Overall great value for money piece of kit and great service from the company.

    United Kingdom

    Great Phone holder

    I'm very happy with purchase. Product meet my expectations. I can use my Samsung s8 plus as speedometer so I save on this. I have where to put my wallet and Keyes.

    United Kingdom


    I quite like it. Does what it is is supposed to!

    Clive C.
    United Kingdom

    Great piece of kit

    Really pleased with my new phone bag. Going on biking holiday and needed a safe way of carrying my phone and being able to see it, great quality and so impressed bought another for my son. Thanks again!


    This BTR Bike Bag is part of our Buy 1 Get 1 Half Price Promotion

    BTR Buy 1 Get 1 Half Price Special Offer Promotion