We are an award-winning company based in Cambridge, England working to improve bicycle safety for children. We want to create a sea-change in bicycle safety, by designing an innovative range of transportation that helps protect your most precious cargo.

Our first product - just launched - is the Conker Safety Cell which, we believe, provides the safest way in the world to take your child by bicycle. This first Conker Safety Cell is designed to be retrofitted to an existing Bakfiest long-wheelbase bicycle.

Ride with Roy very kindly came to Cambridge specially to see and review the Conker, please see his video here.

The Conker Safety Cell will, we hope, encourage many more parents to use their bicycles on a daily basis safe in the knowledge that their child is well protected on their journey to school and elsewhere.


The Conker Safety Cell is an option for cargo bike users, taking the place of the original wooden box and providing far greater safety for young passengers. This is through its aircraft-grade aluminium body, attachment points for ISOFIX car seats, and the innovative inclusion of a Roll Cage in its design.

The Conker Safety Cell is built to provide peace of mind to parents who want to do the right thing for the environment and their children.


The Conker Safety Cell is protected by patent pending (Number: 2112794.9) and registered designs.


Roll cages have been common in cars for many decades, and the concept has been a proven success in the motorsports industry, saving many lives. The Roll Cage ensures that the child is significantly better protected as a passenger in the event of an accident.

We have introduced this concept, we believe, for the very first time into the bicycle industry. The Roll Cage has been tested at Cranfield Impact Centre, UK, and is capable of taking a tonne of weight on top of it.



The most significant benefit of the Conker Safety Cell is its ISOFIX car seat compatible attachment points, which allow it to take a child car seat by being clicked securely into place on the bicycle, equivalent to how these attachment points are used within all modern cars.

The Conker Safety Cell will take car seats sized from birth to approximately 8 years old, depending on the child’s height and the make of the car seat chosen. Most car seats that use ISOFIX and top tether are compatible. The Conker Safety Cell does not include a car seat, compatible options can be bought from retailers such as Halfords. Alternatively, we can also supply suitable car seats: here are a couple of choices we can supply:

  • Cuggle Partridge
    • For children from approximately 6 months to 4 years old
      • Between 9kg to 18kg
      • Groups 1, 2, & 3
    • Retail price of £95
  • Joie Bold
    • For children from approximately 6 months to 6 years old
      • Between 9kg to 25kg
    • Retail price of £199
  • Cosatto: All in All +
    • From Birth to 12 years
      • Up to 36kg
      • Groups 0,1,2, & 3


The Conker Safety Cell can take either one child in one car safety seat or two children on a supplied bench seat.

The Conker ISOFIX-compatible points were also tested at Cranfield and are certified to withstand an 800kg pull – equivalent to an impact in excess of 60mph


The main body and roll cage of the Conker Safety Cell is made of aircraft-grade aluminium, durable both in regard to impact and weather. This welded aluminium is strong and light as well as readily recyclable. The metal used is 6082 - T6

Compatible Bikes

The first Conker Safety Cell is designed to fit the long-wheelbase Bakfiets bike - it simply replaces the original wooden box - even the rain cover from the Bakfiets can be transferred directly over.

We plan to create further versions of the Conker Safety Cell to work with various other cargo bikes, as well as release entirely new products.

Note: We are not connected with Bakfiets NL and do not represent them. Trademarks and brands are the property of their respective owners.


“Parents are making an ethical decision when they choose to transport their child by bike, and the least we can do is help keep their child safer.”


Conker of Cambridge founder Crispin Sinclair is a keen cyclist and father of two young children, with a background in design and innovation.

His passion for cycling – from taking the children to school every day in the Conker Box (prototype) to spending three months riding solo across Europe - gives him a fantastic insight and the determination to demand a better future for his children.

When Crispin’s bike was crushed in a road accident, it sparked the beginning of the Conker of Cambridge journey, bringing innovations from the car safety industry to the bicycle world.

"Innovator of the Show" 2015: The Business Show - Midas Touch 

Bakfiets Bikes Cycle Child Safety ISOFIX Car seat roll cage protective family parents school run commute Safety Cell cargo bike Cambridge child carrier camcycle thinkbike likeability UK Green transport passenger  baby seat review eco-friendly Bullitt bikes design advanced 



Bringing unprecedented child safety to the cycling world. 


All aspects of all designs shown on this website are subject to change at any time and without further notice and none form any part of any contract or obligation. All images used are for illustrative purposes, and may not directly represent the final product and features of the Conker Safety Cell. All rights, including copyright, in this website, are owned by or licensed to Babel Bike Limited (trading as Conker of Cambridge). Any use of this website or its contents, including copying or storing it or them in whole or part, other than for your own personal, non-commercial use, is prohibited without our permission. You may not modify, distribute or repost anything on this website for any purpose without our prior permission - which we may well grant, but please ask first. Trademarks and brands are the property of their respective owners. We are not connected to or in any way affiliated with Bakfiets NL.