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507 URC Mountain Unicycle 24" - Series 1 - FAT

Starting at: 359.00EUR Inc VAT (for EU-countries)
294.26EUR Ex VAT (for NON- EU-countries)

Please Choose:


Seat post

Saddle clamp


Rim colour




Rotor Diam. for brake chosen

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  • Description
  • Details
  • Reviews

  • CrMo frame, light and strong, with DISC Brake Attack
  • you can mount FAT and/or TRADITIONAL tires, according to your needs and desire
  • ​Rim single-wall or REINFORCED ...... to avoid any doubt as regards robustness !


Wheel size: 507 mm 24" x 4.00

Ideal for: free ride, fun off road, adventure
Color: mustard, silver, pink.
Compared to the previous version (black-red-sea green) this new batch has been designed with a 5mm wider clearance (2,5mm each site). This new design is ideal for FAT tire x 4.00.
This new design with wider clearance is available in the colors mustard-silver-pink.
Here the link to the colors of the frame: FRAME
Technical features
Frame: Steel Cr-Mo 4130 (chrome molybdenum steel), thanks to this alloying elements it has an excellent strength to weight ratio and is considerably stronger and harder than not alloyed steel , round, with Disc Brake Attack (Disc and braking system excl.) Size Small
Seat post:  steel 25.4mm
Seat Clamp: double bolt
Saddle: URC COMFORT or Mad4One Slim black or white or Handle Saddle M or S
Please note that you do not find in the photos all options we propose here.
For more infos about the saddle you may mount: SADDLE.
If you have questions or doubts, do not hesitate to contact us.
Wheel: All our wheels are handcrafted by us in our labs in ITALY. For more info please click here: WHEELS.
Rim: 24", Alu 47mm single wall or 46mm REINFORCED (double wall) rim
We propose it in black, but if you wish another color, please go to the site RIMS, choose the color and confirm it putting a note in your order.
Spokes: 36 spokes, carbon steel, four cross spoke pattern
Bearing-holder: 42mm
Tire: Vee Mission Rubber rigid  24 x 4.00, 72 TPI or CHAOYANG Big Daddy 24x4.00
Cranks:Unicycle stuff 140 mm, with a surcharge you may mount the cranks Koox, MAD-Tecno or AGILE. Here the link to our cranks: CRANKS.
Pedals: plastic pedals with large sole, Penta BX, VP532 mirage, Push N2
Leg length: 71 cm min.
Weight: 6,760 kg including Brake-System
As stated above, the frame has already the attack for the Disc BRAKE and the ISIS DISC hub.
Have you in mind to mount your HandleSaddle laterally? In this case a brake system with an openable brake clamp is the right choice.​
Here BEN SOJA's comments on our URC 26-INCH after his Tour in South Africa (19.3. - 28.3.16)
" ....... The URC 26×4” unicycle I got from my sponsor Mad4One held up very well to all challenges on the way. During the adventure, I didn’t get a single flat tire and it survived all big drops and rugged terrain very well. For a steel frame and huge tire, the weight (under 7 kg) is very impressive – no problem to finish rides of 50 km or to carry it up a mountain on your back. I can highly recommend it as a great all-around unicycle....."
Surely the fact that it is a Mountain Unicycle"within the budget of everyone" and has the DISC Brake Attack and an ISIS Disc Hub. But, let's go though each detail......


25.4mm in steel.  It is cheap and  just a little more heavy  compared to the ALU version. Steel is however more resistant.


Also the frame is in CrMo. it is a little more heavier than the ALU version, however more robust.
The URC frame is the only one in CrMo with the Disc Brake Attack.

The URC Mountain Unicycle is proposed in 3 sizes: S, M, L. 
- this one is the S size. Here you can mount wheels up to 26x2.70
The great versatility of this frame allows you to purchase 1 Mountain Unicycle with perhaps 2 different wheels, each one for a specific purpose.


- projected and assembled in Italy with high quality components and innovative mounting schema.
- four cross spoke pattern that  gives high stability to the wheel.
- Spokes and nipples in carbon steel which ensure a high mechanical strength and durability.​
- Important Plus is given by the HUB, CrMo ISIS Disc MAD4ONE.


We propose 6 different braking systems. Here the link: SHIMANO
Do you have any doubts as to which is the right choice for you?
Write us at, we are at your disposal 7/7 and with pleasure we will give you advices and helps for make the right choice.



the large volume of air makes our riding much more smooth, even on rough terrains. Combined with a large (but not too much) Rim (47 mm) the tire form becomes more rounded and easy to use, even when cornering.
You will have high comfort and great fun!
If you like speed, nothing prevent you from mounting a more traditional tire (do not hesitate to ask, we will make the  change).


Excellent quality, in plastic with large sole, very robust however without metallic PINS.



It has been designed for beginners through experts. Ideal for Mountain Unicycle-Road, as well as Hockey and Basket. Contrary to the traditionally ones, this saddle comes with a gentle curve to reduce front pressure. Very good price/performance ratio. The integrated handle provides high comfort (no hole, more security and more space for the fingers).


A Unicycle of high Quality with the BEST Quality-Price Ratio

Which our goal?
The URC by Mad4One in CrMo are designed with a larger audience in mind. We closely studied the balance between QUALITY and price to be able to provide the BEST Quality-Price Ratio you can find on the market, however with the same FLEXIBILITY you know from Mad4One.
We will do our Best to build your unicycle as you like and .... dream!
Having the appropriate tool is the first step for aspiring athletes to achieve their goals. This is our spirit!
We wish you great riding with Mad4One and  URC by Mad4One.


71 cm min.


Your needs in safe hands

The Advantages with Mad4One



​    Tailor-made Unicycles


    Advices and Support, before and after your Purchase,  24/24H, 7/7


​    Worldwide Delivery


    Direct Contact with the Producer of your Unicycle


    High-level Competence and Reliability

Your satisfaction is important for us.
We are proud to put our Know-how at your disposal,
to make sure, you will be happy for long time.


  • TYPE: Adults
  • Ideal for: intermediate level
  • Price range: from 250 to eur 399
  • Frame: CrMo round
  • Wheel size: 507mm 24"
  • Hub: ISIS
  • Cranks length: 135-140
  • Designed for brake: disc brake
  • Seatpost diameter: 25,4


Derler Andreas
5 of 5 Stars
Sehr gute Verarbeitung des gesamten Einrades. Auch die Abwicklung bei der Bestellung hat super funktioniert, mit sofortiger Rückmeldung wenn etwas nicht lieferbar ist. Die Lieferzeit ist auch top innerhalb von 5 Tagen ab Bestellung.


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