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Kryptonite Transit FlexFrame Bracket for Bicycle U-Lock

3.9 out of 5 stars 1,671 ratings
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Purchase options and add-ons

Brand Kryptonite
Special feature Lightweight
Lock type U-lock
Item dimensions L x W x H 14.6 x 6.4 x 6.1 Centimetres
Material Plastic Aluminum
Recommended uses for product Urban cycling
Style Modern
Colour Black
Number of pieces 1
Finish type Painted

About this item

  • Fits bicycle frame tubing from 25mm to 80mm whether the cross-section is round, oval, triangular or square
  • Pre-stretched seatbelt style material contours to the shape of the bicycle frame providing constant contact with the tube while in transit
  • One-bolt design "snugs" the bracket to the bike frame; allows for adjustment without removing the bracket completely
  • Provides the ability to micro-adjust the lock angle in 15 degree increments to better fit and align with a bike's specific geometry
  • Fits all Kryptonite U-locks as well as other brands with 13mm and 16mm round shaped shackles.Instructions are included with the bracket.

Product information

Technical Details

Product Dimensions ‎14.61 x 6.35 x 6.1 cm; 181.44 g
Item model number ‎102369
Is discontinued by manufacturer ‎No
Colour ‎Black
Size ‎One Size
Style ‎Modern
Length ‎5.75 inches
Weight ‎204 g
Shape ‎Round
Material ‎Plastic Aluminum
Number of Items ‎1
Number of Pieces ‎1
Special Features ‎Lightweight
Sport ‎Multi-Sport
Included Components ‎Bracket includes tools to fit.
Batteries Included? ‎No
Brand ‎Kryptonite
Item Weight ‎181 g

Additional Information

ASIN B005YPKLLE
Customer Reviews
3.9 out of 5 stars 1,671 ratings

3.9 out of 5 stars
鶹 Rank
Date First Available Aug. 9 2012
Manufacturer Kryptonite
Place of Business PORTLAND, OR, 97209 US

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Kryptonite Transit FlexFrame Bracket for Bicycle U-Lock

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Product description

The Kryptonite Transit FlexFrame U-lock bracket mounts quickly and easily and support the transportation of the most common U-lock sizes. In the early 1970s, Michael Zane was a free-spirited, bearded kid with a VW van and a big idea for a new kind of lock. He traveled thousands of miles showing the unique U-shaped locking device and spreading his passion for bicycle security to bike dealers all around the country and forged lifetime relationships. The company soon expanded its product line to include powersports, hardware and snowsports security.

Top Brand: Kryptonite

Highly Rated
100K+ customers rate items from this brand highly
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From the manufacturer

Kryptonite Transit Flexframe-U Bicycle Bracket

Easy Transport in Transit

Kryptonite Transit Flexframe-U Bicycle Bracket

Easy InstallBracket Body with PRE-INSTALLED hex bolt for tightening

Kryptonite Transit Flexframe-U Bicycle Bracket

Strap includes STICHTED-IN RUBBER SHIM for easier mounting

Kryptonite Transit Flexframe-U Bicycle Bracket

KNURLED TUGBLOCK increases holding power

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Customer reviews

3.9 out of 5 stars
1,671 global ratings

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Customers say

Customers like the installation of the lock. They mention it's easy to install and secures the lock firmly. However, some customers disagree on the build quality, functionality, and secure fit. Opinions are mixed on the ease of use.

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InstallationBuild qualityFunctionalitySecure fitFitEase of use
9 customers mention "Installation"7 positive2 negative

Customers like the installation of the lock. They mention it's easy to install and secures the lock firmly.

"...Goes on easy enough but you might need to adjust post washing your bike or after some rain." Read more

"...That was very simple and easy to do. Very happy with this purchase." Read more

"easy to put on" Read more

"Not at all user-friendly installation or instructions. What a hassle to put together...." Read more

17 customers mention "Build quality"11 positive6 negative

Customers have mixed opinions about the build quality of the lock. Some mention it's good and solid, while others say it looks flimsy and is made of cheap plastic.

"...Kryptonite Transfit FlexFrame-U Bracket is well made and works with the Kryptonite U lock." Read more

"...It is absolutely crap and makes for a very sketchy bike experience...." Read more

"...Nice mount I just wish it held up longer" Read more

"Sturdy, holds the lock in place and doesn’t break when you go over street car tracks and other significant bumps in the road...." Read more

12 customers mention "Functionality"6 positive6 negative

Customers have mixed opinions about the functionality of the lock. Some mention it works great, while others say it doesn't operate very smoothly and is impossible to use.

"Worked well on my bike, no complaints. The only thing is that you have to cut some material off your lock to make it work." Read more

"...Also when all is said and done does not operate very smoothly...." Read more

"...No as good as the original but it works fine." Read more

"...The grey button for releasing is jammed or not working properly" Read more

10 customers mention "Secure fit"3 positive7 negative

Customers have mixed opinions about the secure fit of the lock. Some mention it holds the lock securely while they're riding, while others say it cannot be secured to their bikes and shimmies down their bodies over time.

"It cannot be secured to my bike. You can just use straps/velcros if your bike has a rack." Read more

"...problem I have with this new bracket is that the "soft strap system" did not stay in place on my seat tube, which is tapered...." Read more

"...It holds the lock securely while I'm riding, though. Can be a bit fiddly to get the lock off, but at least it never falls off while I'm riding." Read more

"...The strap got loose and began sliding around my seat tube as I was riding and when I tried to fix it after my ride I found the rubber strip which..." Read more

9 customers mention "Fit"6 positive3 negative

Customers have mixed opinions about the fit of the lock. Some mention it fits perfectly with the larger of the two, while others say it doesn't fit perfectly and gets tight.

"...The gamble paid off, because it fits perfectly with the larger of the two splines included, once the hex screw is tightened in place...." Read more

"...from some years ago was much sturdier, but did scratch paint and really got tight...." Read more

"Genuine parts that fit perfectly. I used this on my second commute bike (I have one for summer and one for winter in the snow)." Read more

"Easy to install and fit perfectly on my bike." Read more

6 customers mention "Ease of use"4 positive2 negative

Customers have mixed opinions about the ease of use of the lock. Some mention it can be a bit fiddly to get the lock off, while others say the grey button for releasing is jammed or not working properly.

"...So glad I bought this. Now my bag isn’t nearly as heavy and my lock can come with me even when I don’t need a bag...." Read more

"...Can be a bit fiddly to get the lock off, but at least it never falls off while I'm riding." Read more

"...Disappointing, because Kryptonite locks are great. I wish I could get my money back." Read more

"U lock bike bracket..." Read more

As advertised
5 out of 5 stars
As advertised
I had been carrying my kryptonite on my backpack for too long. It was hard to find these retail. So glad I bought this. Now my bag isn’t nearly as heavy and my lock can come with me even when I don’t need a bag. Goes on easy enough but you might need to adjust post washing your bike or after some rain.
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Top reviews from Canada

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  • Liam
    5.0 out of 5 stars Compatible with non-Kryptonite brands of u-locks
    Reviewed in Canada on June 1, 2023
    Verified Purchase
    I have a CCM u-lock that originally came with just a cheap plastic mount, which broke off in pretty short order. I ordered this to replace it, fairly confident it would fit my lock, but not 100% sure. The gamble paid off, because it fits perfectly with the larger of the two splines included, once the hex screw is tightened in place. If you have what you believe to be a standard sized u-lock that isn't Kryptonite brand, this is probably a safe bet.
    One person found this helpful
    Helpful
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  • J Collette
    5.0 out of 5 stars As advertised
    Reviewed in Canada on July 20, 2023
    Verified Purchase
    I had been carrying my kryptonite on my backpack for too long. It was hard to find these retail. So glad I bought this. Now my bag isn’t nearly as heavy and my lock can come with me even when I don’t need a bag.
    Goes on easy enough but you might need to adjust post washing your bike or after some rain.
    Customer image
    J Collette
    5.0 out of 5 stars
    As advertised

    Reviewed in Canada on July 20, 2023
    I had been carrying my kryptonite on my backpack for too long. It was hard to find these retail. So glad I bought this. Now my bag isn’t nearly as heavy and my lock can come with me even when I don’t need a bag.
    Goes on easy enough but you might need to adjust post washing your bike or after some rain.
    Images in this review
    Customer image
    2 people found this helpful
    Helpful
     Report
  • 鶹 Customer
    1.0 out of 5 stars Not working on my bike and not worth the value
    Reviewed in Canada on May 20, 2025
    Verified Purchase
    It cannot be secured to my bike. You can just use straps/velcros if your bike has a rack.
    One person found this helpful
    Helpful
     Report
  • Stuart Rogers
    4.0 out of 5 stars Great customer support from this company
    Reviewed in Canada on June 3, 2023
    Verified Purchase
    I was so pleased to find that I could replace the mounting bracket for my decades-old Kryptonite U-lock. It's refreshing to find a company that provides support for their products for such a long time. The original bracket had a hard plastic restraining strap that broke when shaken to bits while I was riding over some of the roughest, most neglected pavement in the city. (I'm lucky to still have my teeth after that ride.) The only problem I have with this new bracket is that the "soft strap system" did not stay in place on my seat tube, which is tapered. The installation instructions warn against overtightening lest the tube be crushed, so I could not prevent the bracket from sliding downward and then rotating sideways. I've relocated the bracket to the down tube, which is not tapered, and it has stayed in place. I had to change the shackle on my lock, using one supplied in the kit. That was very simple and easy to do. Very happy with this purchase.
    One person found this helpful
    Helpful
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  • patrick jean-charles
    5.0 out of 5 stars Parfait
    Reviewed in Canada on December 26, 2023
    Verified Purchase
    C est exactement ce que je cherchais
    Helpful
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  • Chrisizzle
    5.0 out of 5 stars Good replacement part
    Reviewed in Canada on December 6, 2021
    Verified Purchase
    Nice to know I could get a new bike mount without having to buy a whole new lock. This is from Kryptonite and every bit as good as the one that came originally with lock.
    Helpful
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  • Craig Isberg
    5.0 out of 5 stars Original Kryptonite parts
    Reviewed in Canada on September 8, 2021
    Verified Purchase
    I tried a cheaper U-bracket lock carrier that only lasted a month.
    Kryptonite Transfit FlexFrame-U Bracket is well made and works with the Kryptonite U lock.
    One person found this helpful
    Helpful
     Report
  • Adrien Dubois Ahlqvist
    1.0 out of 5 stars Dreadful crap
    Reviewed in Canada on February 5, 2025
    Verified Purchase
    The thing will just spin about any of the tubes you put it in. It is absolutely crap and makes for a very sketchy bike experience. A very very obvious worse product than the one that came with your lock that held with SCREWS.

    Do not buy.
    One person found this helpful
    Helpful
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Top reviews from other countries

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  • Andreas Gabrielsson
    5.0 out of 5 stars Bra
    Reviewed in Sweden on October 30, 2024
    Verified Purchase
    Är precis vad som står på beskrivningen.
    Report
  • AE_Conrady
    5.0 out of 5 stars Nicht perfekt - aber alternativlos ist die
    Reviewed in Germany on February 11, 2019
    Verified Purchase
    Kryptonite Flex Frame Schlosshalterung.

    Bei mir war eine neue Halterung für ein 20 Jahre altes Bügelschloss von Kryptonite (13mm) notwendig, weil das neue Rad wesentlich stärkere Rohrdurchmesser besitzt. Der eigentliche Halter wird mit einem Spannband an einer beliebigen Stelle am Rahmen angebracht. Durch die Bandbefestigung passt das an fast alle Rohrdurchmesser. Dazu gibt es im Internet ein Video. Ansehen ist hilfreich. Das Ganze ist nicht kompliziert, aber Fehler können einem die Funktion vermiesen. Gummiunterlage und Spannband sollte richtig positioniert werden, vor allem sollte das Spannband vor dem Anziehen mit der Schraube einigermaßen straff sitzen. Die Schraube kann sich nicht in den Rahmen bohren, wie hier behauptet, da sie nur Bandplatte nach außen zieht und damit das Band strafft.

    Das Gegenstück wird einfach am Schloss mit einer Madenschraube befestigt, bei mir war dies das 13mm Gegenstück. Ein Stück der Ummantelung muss dabei entfernt werden. Nun wird das Schloss eingerastet und sitzt perfekt. Was ist nicht so gut? Das Gegenstück aus Metall kann beim Anschließen den Rahmen verkratzen, ist aber wesentlich robuster als Kunststoff. Das Schloss kann im Winter sehr fest in der Halterung sitzen, so dass man es schwer heraus bekommt. Trotzdem 5 Punkte, da Robustheit, Nachrüstbarkeit und universelle Verwendbarkeit auch bei schweren Schlössern den Ausschlag geben müssen.
    Customer image
    AE_Conrady
    5.0 out of 5 stars
    Nicht perfekt - aber alternativlos ist die

    Reviewed in Germany on February 11, 2019
    Kryptonite Flex Frame Schlosshalterung.

    Bei mir war eine neue Halterung für ein 20 Jahre altes Bügelschloss von Kryptonite (13mm) notwendig, weil das neue Rad wesentlich stärkere Rohrdurchmesser besitzt. Der eigentliche Halter wird mit einem Spannband an einer beliebigen Stelle am Rahmen angebracht. Durch die Bandbefestigung passt das an fast alle Rohrdurchmesser. Dazu gibt es im Internet ein Video. Ansehen ist hilfreich. Das Ganze ist nicht kompliziert, aber Fehler können einem die Funktion vermiesen. Gummiunterlage und Spannband sollte richtig positioniert werden, vor allem sollte das Spannband vor dem Anziehen mit der Schraube einigermaßen straff sitzen. Die Schraube kann sich nicht in den Rahmen bohren, wie hier behauptet, da sie nur Bandplatte nach außen zieht und damit das Band strafft.

    Das Gegenstück wird einfach am Schloss mit einer Madenschraube befestigt, bei mir war dies das 13mm Gegenstück. Ein Stück der Ummantelung muss dabei entfernt werden. Nun wird das Schloss eingerastet und sitzt perfekt. Was ist nicht so gut? Das Gegenstück aus Metall kann beim Anschließen den Rahmen verkratzen, ist aber wesentlich robuster als Kunststoff. Das Schloss kann im Winter sehr fest in der Halterung sitzen, so dass man es schwer heraus bekommt. Trotzdem 5 Punkte, da Robustheit, Nachrüstbarkeit und universelle Verwendbarkeit auch bei schweren Schlössern den Ausschlag geben müssen.
    Images in this review
    Customer imageCustomer imageCustomer image
    Report
  • Hugo Magalhaes
    5.0 out of 5 stars Support super robuste
    Reviewed in France on March 31, 2025
    Verified Purchase
    Support super robuste. J'ai acheté un nouveau modèle pour remplacer mon ancien, que j'utilisais depuis plus de quatre ans. J'apprécie particulièrement qu'il offre deux positions de montage : face avant ou sur le côté. Je le recommande vivement.
    Report
  • Joaquim Seabra
    5.0 out of 5 stars Cumpre integralmente a sua função
    Reviewed in Spain on March 31, 2024
    Verified Purchase
    Utilizo-o há mais de 2 anos sem qualquer problema. Cumpre bem a sua função.
    Report
  • Robert Prol
    5.0 out of 5 stars Simple install
    Reviewed in the United States on April 13, 2025
    Verified Purchase
    I have a Kryptonite lock on one of my bikes, and decided to swap it between my city bikes and my gravel bike. This made it simple. Each bike has a different mounting angle, so having the extra connector was a big plus. I was able to mount a connector on each side of the U.
    Report