The LV stands for "Lewis Vertical" due to the vertical positioning of the piston. This allows the lever to be much more compact and often needs to be run closer to the handlebar grip. The piston is also wider than the LH brakes & finger lever is shorter. This gives the LV brakes a sharper more direct feeling in comparison to the LH brakes.

Both the LV2 and LV4 share the same levers design. The LV4 uses the same caliper as the LH4. The LV4 offer greater power due to extra friction of the larger brake pads.

Comparing the LV4 to LH4 and LHP S4: The LV4 has similar amounts of power, however the force required to get the power is slightly higher than the LH with same size pistons. The power from the LV4 is more direct curve which in turn makes the brake fast to react but with slightly less modulation.

The LH stands for "Lewis Horizontal" due to the Horizontal positioning of the piston. This makes the lever longert and often needs to be run further away from the handlebar grip. The piston is also thinner and longer the LV brakes & finger lever is longer too. This gives the LH brakes great modulation and control.

Comparing the LH4 to LHP S4: The LH4 and S4 use the same piston size and brake pads. The levers are very similar and the feel of the brakes are almost identical apart from the extra adjustment on the LHP S4. The ratio adjustment can adjust the leverate ratio, this changes the force required to push the piston. That means you can fine tune the brake to be more sharp or less sharp.

Comparing the LH4 to LHT, LHP U4: The LHT and U4 use larger diameter calipers and this is the main difference. This give added friction and power in comparison. The difference is noticeable but the smaller LH4 caliper still delivers a lot of power that is suitable for almost every bike on the market.

The LHT are the high end of the LEWIS brakes. They offer the most power in a 4 piston brake and most adjustability with the 3 adjustments. Reach, bite point and Ratio.

Comparison to LHP U4: The main difference between these brakes is the upgraded cooling fins that sit behind the brake pads. This change is specifically useful for those with heavier E-bike or E-Moto bikes that require a higher amount of heat displacement. In terms of power and adjustability they are equal. In terms of materials the LHT has an edge with fully Titanium fixings and internal caliper pistons.

The LHP lever is the same for all S4, U4 and S6 models. The LHP lever offer the maximum amount of adjustability with Lewis patented tech. 3 adjustment type.

1. Lever reach, adjust the distance from grip to lever.

2. Bite point, adjust the distcance the lever must move before the brake pads bite the rotor.

3. Ratio adjustment, adjusts the leverage applied to the lever piston. This can adjust the feel of the brake from sharp to less sharp.

The LHP S6 is designed for extreme use and has a very large surface brake area. The EP6 also has the same brake surface area, using the same size barek pads. However the LHP uses the more compact lever running Mineral oil. This means it is more user friendly and can be fitted as normal to any bike.

The EP6 is a larger lever to run the DOT 5.1 oils, this type of oil can withstand increased running temperatures and is designed for the highers power E-Moto bikes. The EP6 caliper also has a +10mm offset. The offset means the user must use a larger rotor of +20mm to use the EP6. Example: Bike mount is PM200 and bike has 200mm rotor installed. To install the EP6 the bike needs to upgrade the Rotor size to 220mm.

Leverage ratio adjustment can be found on LHT and LHP models only. It is a patented technology that you wont find on any other brand.

Ratio adjustment, adjusts the leverage applied to the lever piston. This can adjust the feel of the brake from sharp to less sharp.

This adjustment if beneficial as it allows you to tune your brake and feel more like what you like or are used to.

Recently there has been some internal and external upgrades to the LEWIS Flat mount calipers.

The BB2 SS is the original deisgn with Steel pistons and fixings. The BB2 Ti, is exactly the same with reduced weight due to Titanium fixings.

The SL is the new updated design. From outside there is not a clear differnce, however with cleaver CNC and updated hose connectors the weight has been reduced to similar lever like the BB Ti. The SLR takes that even further and reduces more weight with Titanium fixings an pistons.

All calipers have the 21mm pistons and will have the same performance and feel like eachother with the exception of BB2 Ti and SLR having improve heat performance due to the low heat expansion properties if Titanium.