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Frames

In this category you find various types of frames, from the most basic to the most professional ones.

First of all, the material !!!

  • Steel (URC)  
    heavier but it can be easily bent and modified  (if needed you can bring it back in its original shape).
  • Aluminum (Mad4One) 
    lighter and more rigid, however, you will not be able to modify its shape (if accidentally you bend it, you will not be able to bring it to its original shape)!


It is important to check the width of the frame to the base (the attack of the wheel) to make sure that the frame gets into your wheel! Furthermore, check the width of the seat tube attack.

For Trial unicycling, better to have a round crown frame, your knees will be safe!

In Freestyle there are two different approaches:

There are riders who prefer that the width of the seat tube attack is bigger to climb up more easily, other ones (experts) prefer to have it smaller because it is less bulky.

Another feature to be considered is the clearance, i.e. the distance between the wheel and the frame in order to decide the type of tire to mount.

 

The URC frame, CrMo

 

Braking system and tire

 

The disc brake appears on the market around 2012 and, in recent years, it has radically changed the technical control of the unicycle in DH. 4 years have passed, and we can now say that the brake pad is over.

The traditional frames, that have been designed with brake pad attack are dedicated to a specific wheel size. In fact, we have the frame for the 24-inch wheel, the frame for the 26-inch wheel and so on.

We think that it is the right time, to think of frames NOT designed for the brake pad.

URC has developed its own frame for MUNI (...and not only...) in 3 sizes, not linked to a specific wheel size.

 

The frame is available in the following sizes: Extra-Small - Small - Medium - Large

On the  "Extra-Small" you can mount:

-  the 20-inch wheel with the 20 x 4.00 tire

On the  "Small" you can mount:

-  the 24-inch wheel with the 24 x 4.00 tire

-  the 26-inch wheel with the 26 x 2.70 tire

On the  "Medium" you can mount:

-  the 26-inch wheel with the 26 x 4.00 tire

-  the 27.5-inch wheel with the 27.5 x 3.50 tire

- the 28-inch wheel with the 29 x 2.50 tire

On the  "Large" you can mount:

-  the 27.5-inch wheel with the 27.5 x 3.50 tire

- the 28-inch wheel with the 29 x 3.00 tire

 

IMPORTANT: compared to the previous version (black-red-sea green) the new batch produced in May 2017 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 frame is available in the colors mustard-silver-pink.

 

The URC frames are designed for standard hubs with 100 mm pitch (distance between the bearings).

The height of the frame, together with the length of the cranks, is the dimension to consider when you decide the size of our uni based on your min. crotch height.

Below the frame height:

URC-Extra-Small = 45 cm

URC-Small = 49,5 cm

URC-Medium  = 53,5 cm

URC-Large = 55 cm

 

Thickness of the saddle: approx. 6,5 cm

 

URC-Extra-Small: with the 125-cranks we will have a min. crotch height of  (45 + 6,5 + 12,5) = 64 cm

URC-Small: with the 140-cranks we will have a min. crotch height of  (49,5 + 6,5 + 14) = 70 cm

URC-Medium : with the 140-cranks we will have a min. crotch height of (53,5 + 6,5 + 14) = 74 cm

URC-Large : with the 140-cranks we will have a min. crotch height of (55 + 6,5 + 14) = 75,5 cm

 

NOTE: if we shorten our cranks we reduce the minimum crotch height, however, if we mount longer cranks, the crotch height will increase.


On the other hand, if we speak of the tire, the choice here is really wide.

The URC frame has
therefore a second PLUS, I can buy a frame and different wheels, each one for a specific need / terrain / ride

 

The MAD4ONE Muni frame, ALU 7005

 

MAD4ONE has developed its own MUNI frame in 3 different sizes, not linked to a specific wheel size.

 

The sizes are: Small - Medium - Large

On the  MAD4ONE- S  you can mount:

24-inch wheel with a traditional tire up to 24 x 3.00

26-inch wheel with a traditional tire up to  26 x 2.70

The inside width is 91 mm.

 

On the  MAD4ONE- M  you can mount:

24-inch wheel with a 24 x 4.00 fat tire

26-inch wheel with a traditional tire up to 26 x 3.00

27.5-inch with a traditional wheel up to 27.5 x 3.25

28-inch with a traditional tire up to 29 x 2.50

The inside width is 91 mm.

 

The MAD4ONE- L  has been designed specifically for the FAT tires lovers.

On this frame you can mount:

26" with a 26 x 4.00 fat tire

27.5" with a 27.5 x 3.80 fat tire

28" with a 29 x 3.25 fat tire

The inside width is 103 mm.

 

Once we have mounted our FAT tire the clearance keeps wide and this provides excellent control of your muni even on muddy terrain.

 

The height of the frame, together with the length of the cranks, is the dimension to consider when you decide the size of our uni based on your min. crotch height.

Below the frame height:

MAD4ONE- S  = 49,5 cm

MAD4ONE- M  = 53 cm

MAD4ONE- L  = 55 cm

Thickness of the saddle: approx. 6,5 cm

MAD4ONE- S  : with the 140-cranks we will have a min. crotch height of  (49,5 + 6,5 + 14) = 70 cm

MAD4ONE- M  : with the 140-cranks we will have a min. crotch height of (53 + 6,5 + 14) = 73,50 cm

MAD4ONE- L  : with the 140-cranks we will have a min. crotch height of (55 + 6,5 + 14) = 75,5 cm

 

NOTE: if we shorten our cranks we reduce the minimum crotch height, however, if we mount longer cranks, the crotch height will increase.

The MAD4ONE Muni frames have been designed for hubs with 42mm bearings, with 100 mm pitch (distance between the bearings).

 

The sizes M and L are available also in the LONG-NECK version

Here the vertical tube is 10cm longer than the standard ones.

With the LONG-NECK frame the min. leg lengths are extended by 10 cm.

The LONG-NECK is available in the following colors: blue, flash green, titanium, bronze. On request we can anodize it in one of the 13 different Made in Italy colors you prefer. Just tell it!

The LONG-NECK is important for taller riders. It offers greater stiffness and a more stable placement of your saddle.

Combined with our MAD XXL seat-post this frame ensures the right position of your legs even if you are more than 2 mt tall.

MAD4ONE- LONG-NECK - M  : with the 140-cranks we will have a min. crotch height of (63 + 6,5 + 14 + 28,5) (9cm of our MAD XXL seatpost) = 112 cm

MAD4ONE- LONG-NECK - L  : with the 140-cranks we will have a min. crotch height of (65 + 6,5 + 14 + 28,5) (9cm of our MAD XXL seatpost) = 115 cm

A leg-length of 115cm corresponds to a height of approx. 2,30 mt.

 

                                 .

 

We have noticed that some Producers insert in their frames a very long seatpost in order to increase the robustness and stiffness of the frame.

This is not necessary with our frames. It is sufficient to have a length of 10-15 cm to ensure the best stiffness. All seatpost in excess is just unnecessary weight.

 

 




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