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I am interested in the Rohan RFX11 wheels, which are available in two different levels of concavity and offsets for both Gen 1 and Gen 2 models. Please refer to the attached pictures for further details.

The specifications for the item are as follows: Gen 1, with a size of 20x11, an ET of +35, and a mid concave design.


The specifications of the wheel are as follows: it is a Gen 2 model with dimensions of 20x11 inches, has an offset of ET +30, and has an extremely deep concave design.


I want a more pronounced concave shape, however, this is the response I received from Rohana:
For the Gen2 model, if you want to get the most pronounced concave profile on the 20x11 rear wheels, you will need to choose for the 20x11 +30 Super Deep Concave profile. However, please note that this configuration may need the use of spacers in order to provide sufficient clearance for the brakes. Alternatively, you have the option to use 20x11 +35 Mid Concave without spacers, as seen in the Gen 1 model. However, this configuration will not provide as pronounced of a concave shape.

Just to clarify, I am currently using Gen 2 wheels that have a size of 20x11 with an offset of +47 and a 12mm spacer, which essentially brings the offset to +35.




Can someone confirm whether a wheel with dimensions of 20x11 and an offset of 30 (ET 30) would fit without the need for a spacer? Will all 20x11 ET +30 wheels have the same amount of protrusion, allowing me to obtain reference pictures for other wheels? If I decide to get a spacer, I believe the smallest size I would consider is a 10mm hub adaptor. This would result in a +20 offset and extend the wheel outward by an additional 1.5cm compared to its current position, which I believe would exceed the desired amount.

Is there any other method to determine this without doing a test fitment?

Thank you in advance.

In general, wheels of same width and offset will protrude the same distance overall, specifically in relation to the position of the wheel's mounting face compared to the outside edge of the lip.
The distinction lies in the configuration of the spoke profile. The modification to the profile will impact factors such as the space between the brake calliper and the wheel, and this might differ regardless of the offset. Manufacturers often provide several "Disc" designs with varied levels of concavity to suit different types of brakes. Usually, wheels with a more concave shape and without many pieces will provide improved brake clearance, but they may protrude somewhat more. However, this contradicts the information given by Rohana, therefore I suggest seeking additional confirmation from them. Perhaps the wheels with a greater curvature have spokes that are somewhat thicker, or it is possible that there was a simple error in perception. I lack firsthand experience with these wheels to determine their compatibility with the callipers.

Thank you for the guidance. I will attempt to get one in order to assess its compatibility. It would be ideal if it were a perfect fit.

Please inform us if you discover the answer, regardless of whether it is positive or negative. I have a strong preference for concave wheels.

I own multi-piece wheels with dimensions of 20x9 inches and an offset of 34, as well as 20x12 inches with an offset of 40. Conversion to Centerlock.

Although not entirely concave as you said, wheels without a lip and made from a single piece might have a significant depth with this offset. There are no problems with brake clearance, and the tyres slightly extend beyond the wheel arches.

Although somewhat tangential to the current discussion, could you perhaps explain the process you used to convert to centerlock?

Forgeline, the producer of wheels, provided a well designed kit.

Thank you!