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Crewkerz Jealousy 20"

Product code: 12685

£1499.99RRP: £1774.17(Save 15%)

In stock

Crewkerz Jealousy 20"

Dispatch time 1-2 days - this bike is assembled in our workshop before dispatch. Minor assembly required on arrival, details supplied with bike.

  • Updated Crewkerz Jealousy frame!
  • Latest generation Crewkerz Carbon 20" forks.
  • Through axles front and rear.

Crewkerz are renowned for their innovation, and this bike is no exception. Following on from the success of the first generation Jealousy, this version is almost 500g lighter!

- Latest generation carbon fibre forks.
- Bolt through axles front and rear for ultimate stiffness and definitive wheel positioning.
- Revised and improved splined crankset with incredibly stiff bottom bracket area.
- Disc side dropout and post mount disc mount are CNC machined from a single piece of aluminium for added stiffness.
- 1.5" to 1 1/8" tapered headtube and fork steerer.
- Powerful, four piston Magura MT7 disc brake on the rear with a Magura HS33 rim brake up front.
- Improved 108 click freewheel with super strong springs and a splined interface, protected by a re-designed bash ring.
- New, lightweight rims front and rear.
- OBR Gekok tyres front and rear offer fantastic grip.
- Single caged pedals, saving a large amount of weight.

Frame and Fork
- Frame: Crewkerz Jealousy, post mount disc mount with 12mm bolt through axle, 135mm spacing
- Fork: Crewkerz Carbon, 4-bolt only with 9mm bolt through axle, tapered steerer tube and integrated crown race

- Front hub: Crewkerz Non-Disc sealed bearing, 9mm bolt through axle
- Rear hub: Crewkerz Disc sealed bearing, 12mm bolt through axle, splined sprocket interface
- Chain tensioner: Crewkerz WAW (Wild And Wired)
- Front rim: Crewkerz, 32h, single wall, 32mm wide
- Rear rim: Crewkerz, 32h, single wall, 47mm wide
- Spokes: Sapim double butted, black
- Nipples: Aluminium, anodised red.
- Rim tape: Crewkerz
- Inner tube (front): Maxxis
- Inner tube (rear): Maxxis
- Front tyre: OBR Gekok F20, 20" x 2.0"
- Rear tyre: OBR Gekok R19, 19" x 2.6"

- Front brake: Magura HS33
- Front brake clamps: Crewkerz
- Front brake pads: Crewkerz, Blue
- Rear brake: Magura MT7
- Rotor: Magura Storm SL, 160mm

- Cranks: Crewkerz WAW, 165mm, with integrated axle and splined freewheel system
- Freewheel: Crewkerz WAW, 18t, 108 engagements
- Chain: KMC Z610HX, Black
- Rear Sprocket: Crewkerz Splined, 12t
- Pedals: Crewkerz Single Cage
- Bottom bracket: AS30 with aluminium axle
- Bashring: Crewkerz WAW

- Headset: Internal style, sealed bearing, 1 1/8" top and 1.5" bottom
- Stem: Crewkerz WAW, Forged, 150mm x 35°
- Grips: Crewkerz Foam
- Handlebars: Crewkerz Riser 2017

- Wheelbase: 1010mm
- Chainstay: 350mm
- BB Height: +95mm
- Head Angle: 72°
- Reach (from centre of BB shell to top centre of head tube): 610mm
- Weight: 7.820kg (including pedals)

This bike is supplied with a 6 month warranty covering manufacturing and materials defects. The warranty does not cover mistreatment or poor maintenance. Please ensure all the details on the warranty sheet supplied with the bike are adhered to. Certain circumstances (such as stripped threads or rounded crank arm tapers) only occur due to a lack of correct maintenance and all manufacturers are aware of these situations, so any claims due to incorrect maintenance procedures are much less likely to be successful.

We build this bike to a 100% complete state in our workshop before dispatch to ensure all items are manufactured correctly and nothing is missing, but we do have to remove some parts to ensure there is no damage during transit. You will need some basic tools (usually 4mm, 5mm, 6mm and 8mm allen keys and a 15mm spanner) for final assembly upon arrival. We have a video guide here to help, but please don't hesitate to contact us if you require any further assistance.



Hey guys, I want to put some thicker spokes in my 2018 crewkerz rear wheel. But can’t find the centre to flance distance and rim hole offset anythere. Do you guys know these measurements? Thanks in advance, Bart

Posted by Bart

Reply from TartyBikes

Hi Bart!
We don't have the dimensions to hand, although we should be able to estimate them from past experience, and looking through our spoke calculator.
That said, if you have the wheel there already, your best bet will be to measure the spokes you have if you're planning on retaining the same lacing pattern. This measurement is taken from the shoulder of the spoke to the tip of the spoke, at the end of the threaded section. You don't necessarily need to remove a spoke to measure it (although it will give more accuracy if you do), so just using a ruler or tape measure should allow you to see what length you'd need drive and non-drive side.
If you need any more help, feel free to ask!


Hey Tartybikes, I've noticed some 20'' bikes have dual disc brakes and others have a rim brake up front, and a disc in the rear. I know rim brakes lock up easier, but why in the front and not the rear? Is it for performance? Or preference? And why do 26" comp bikes have dual rim brakes but 20" comp bikes don't? Thanks! -soren

Posted by soren

Reply from TartyBikes

Hi Soren!
Disc brakes have more hold and power than rim brakes, so they're still good on the rear of a 20" bike where you need that hold more than you necessarily need immediate bite. The front brake tends to be a bit more "on/off" for most competition riding these days, so having that snappy bite from a rim brake works better for that application. It also helps save a little weight too.
Disc brakes don't tend to work as well for trials on larger wheel sizes as you get more spoke flex. As 26" wheels use much longer spokes, the twist/flex you get between the hub and the rim is more pronounced. With 20" and 24" wheels this isn't so noticeable, but for really precise/accurate competition style riding it becomes more of an issue on a 26" wheeled bike.
A 160mm rotor is usually fine for 20" wheel bikes, but for 26" you will usually need at least a 180mm or 200mm rotor so that increases the weight penalty of running a disc brake too.
Hopefully this helps - if you have any more questions, feel free to ask!


Hello Adam Is it the real weight of the bike ?? Maybe U know what is the real weight of a double disc version ? :) Thanks very much Maciek

Posted by Maciek

Reply from TartyBikes

Hi Maciek - This is the correct weight for the bike. Unfortunately we don't have a weight for the dual disc version, sorry. Thanks, Mark


Please measure the chainline on the 20" Jealousy for me at the rear hub.

Posted by Ron

Reply from TartyBikes

Hi Ron - The chain line is approx. 46mm. Thanks, Mark

Manuel Fernandez

Is this possibly the best trials bike ever designed? Have any of Tarty's riders tested it and would you kindly comment on how it feels and also on ease of maintenance? Based on the photos, to me it looks like a very low maintenance bike, and the every little detail of the design seems superb. Thanks

Posted by Manuel Fernandez

Reply from TartyBikes

Hi Manuel - I wouldn't like to commit to saying it's the best ever, but it's certainly a very well designed bike! The bike feels incredibly stiff thanks to all the structural tweaks, and the brakes feel absolutely fantastic. We've not ridden them properly, but from having a little test-pedal around the workshop they seem to modulate really well and have bucket-loads of power. Maintenance would be similar to most other trials bikes - just keep threads greased and bolts tight! Hope that helps. Thanks, Flipp.


Write a review


Based on 1 customer rating


Love it

Posted by Michael

Had this bike for just about a month now and what a difference, bike is super stiff and the geometry is perfect. Really impressed with the technology used on the bike, the thru axles mean that wheels never need set up, the cranks are super stiff with no flex in the frame. Genuinely impressed by the ingenuity of crewkerz.

Reply from TartyBikes

Hi Michael - It's great to hear you like your new Jealousy. They are super stiff little bikes! Thanks for the review.

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  • © TartyBikes Ltd, 2019
  • Tel. (UK). 01772 32 33 33
  • Tel. (Intl). 0044 1772 32 33 33

TartyBikes Ltd, Units 3-4, Club Street, Bamber Bridge, Preston, PR5 6FN

  • Company No. 6131482
  • VAT. GB 860 0270 59

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