KS LEV Si (integra)

What KS LEV Si Integra is and how to choose it by diameter, travel and frame

Internal routing | KS LEV Si Integra | 27.2 / 30.9 / 31.6 / 34.9 mm diameter | 100–150 mm travel | Length and insertion depth | Lever and post action | Comparison with other KS ranges | FAQ

KS LEV Si Integra is an internally routed Kind Shock dropper post for riders who want clean housing routing inside the frame, handlebar remote control and wide compatibility across different frame types. Compared with a regular fixed seatpost, it allows you to change saddle height while riding, so you can pedal efficiently on climbs and lower the saddle before a descent for better control over the bike.

Within the KS range, it can be understood as a mid-to-higher internally routed model line. It makes sense when you want more than a basic model, but do not necessarily need the main LEV Integra range or a carbon version. The key is to choose the correct diameter, travel and length, and to confirm that the frame supports internal routing.

What KS LEV Si Integra is

KS LEV Si Integra belongs among internally routed Kind Shock dropper posts. The Integra name means that the control routing does not run externally along the frame, but through the frame structure. The result is a cleaner bike appearance, a lower risk of housing snagging in terrain and a more modern solution for frames prepared for internal routing.

LEV Si Integra is particularly interesting because it covers multiple diameters, including 27.2 mm and 34.9 mm. This means it can make sense for slimmer XC, gravel or hardtail frames, as well as for more robust modern MTB, trail or enduro frames depending on the exact version.

If you are specifically looking for KS LEV Si Integra or Kind Shock LEV Si Integra, always choose the version according to your frame. The same model can exist in different diameters and travel options, which make sense for different riders, frames and riding styles.

Who KS LEV Si Integra makes sense for

KS LEV Si Integra makes sense for riders who want an internally routed dropper post for MTB, hardtail, trail or, depending on the specific version, also XC and gravel. In technical terrain, a lower saddle position helps you work better with body position, ride steep sections with more confidence and gain more clearance over the bike.

In the 27.2 mm diameter, LEV Si Integra can be interesting for XC, gravel, older frames or slimmer hardtails, where shorter travel and precise matching of post length to the frame are important. In 30.9 mm and 31.6 mm diameters, it is more commonly aimed at regular MTB, hardtail and trail use.

The 34.9 mm diameter is important mainly for newer, more robust frames where the larger seat tube diameter is connected with a stiffer frame design and more modern MTB or trail/enduro use. Before choosing, always check the exact frame specification, because seatpost diameter cannot be safely estimated by appearance.

Internal routing and handlebar remote control

KS LEV Si Integra uses internal housing routing, so the frame must have an entry point for routing to the seatpost and must allow the housing to run inside the frame. If you are not sure whether the frame supports internal routing, start by checking the frame, not by choosing the travel.

Handlebar remote control is essential for real-world use in terrain. You can lower or raise the saddle without taking your hands off the handlebars, which is the main advantage over fixed seatposts or posts controlled directly under the saddle. For each specific version, check whether the lever is included and what type of control you are getting.

Some versions may include a KGSL lever. For frequent MTB and trail use, lever quality is noticeable because it affects ergonomics, control resistance and the overall feel of the post. Smooth housing routing without sharp bends is just as important.

Seatpost diameter: KS LEV Si Integra 27.2 / 30.9 / 31.6 / 34.9 mm

KS LEV Si Integra comes in 27.2 mm, 30.9 mm, 31.6 mm and 34.9 mm diameters. The seatpost diameter must match the internal diameter of the frame’s seat tube exactly. If the frame requires 30.9 mm, a 31.6 mm post will not fit mechanically. If the frame requires 34.9 mm, a narrower post is not the correct solution without clearly confirmed compatibility.

KS LEV Si Integra 27.2 mm makes sense mainly for frames with a narrower seat tube, typically XC bikes, gravel bikes, some older frames or slimmer hardtails. With this diameter, it is important to check travel, overall post length and available insertion depth inside the frame.

KS LEV Si Integra 30.9 mm and KS LEV Si Integra 31.6 mm are aimed at regular MTB, hardtail and trail frames. These diameters are common on modern mountain bikes and usually offer a good balance between available travel, stiffness and frame compatibility.

KS LEV Si Integra 34.9 mm is relevant mainly for more robust modern frames where the manufacturer uses a larger seat tube diameter. With these frames, the correct diameter is essential — do not choose a post by guesswork or by similarity to another bike.

Travel, length and insertion depth: 100 / 120 / 125 / 150 mm

KS LEV Si Integra appears in this category with 100, 120, 125 and 150 mm travel options. Travel defines how far the saddle can drop. More travel gives more clearance over the bike on descents, but it also usually means a longer post and higher demands on the frame and saddle height.

KS LEV Si Integra 100 mm makes sense for smaller frames, shorter riders, XC, gravel or situations where there is not enough space in the frame for a long post. Shorter travel is not a worse choice if it better matches the frame and correct saddle height.

KS LEV Si Integra 120 mm can work well on narrower frames, for XC/gravel use or where you want more clearance than a 100 mm version, but still need a reasonable overall post length.

KS LEV Si Integra 125 mm is a more universal value for MTB, hardtail and regular trail use. It gives a noticeable difference in technical terrain while usually remaining easier to fit than longer-travel options on smaller frames.

KS LEV Si Integra 150 mm makes sense for more trail-oriented use, taller riders or larger frames. With this version, it is important to check overall post length, minimum insertion and correct saddle height carefully. The highest available travel is not automatically the best choice.

Post action, play and return

With a dropper post, it makes sense to look not only at parameters, but also at the actual action. KS LEV Si Integra should return smoothly after installation, without rubbing and without sinking under rider weight. If the action feels heavy or the post does not return correctly, the issue is not necessarily inside the post itself — housing routing, cable tension or seatpost clamp torque often plays a role.

A certain amount of construction play can appear on dropper posts, but it should not be so noticeable that it disturbs riding or feels like a defect. After installation, it is useful to check return speed, side play, remote response and whether the post sinks under load.

The seatpost clamp also plays a major role. If it is tightened too much, it can negatively affect dropper post function. Tighten it carefully according to the frame and post recommendations, not by applying maximum force “just to be safe”.

How KS LEV Si Integra differs from other internally routed KS ranges

Within internally routed KS dropper posts, KS LEV Si Integra feels like a mid-to-higher model range. Compared with KS e20i / Rage-I Integra, it can make sense when you want a broader diameter range, including 27.2 or 34.9 mm, and a more refined internally routed option.

Above it sits KS LEV Integra, which can be understood as the main internally routed KS range with a broader spread of variants and uses. For lighter or more performance-oriented builds, there is also LEV Carbon & CI Carbon Integra.

However, it does not make sense to compare model ranges before checking compatibility. Seatpost diameter, travel, overall length, insertion depth and internal frame routing must fit first. Only after that does it make sense to decide whether Rage-I, LEV Si, LEV Integra or a carbon version is the better option for you.

What to check when choosing KS LEV Si Integra

• Internal frame routing: The frame must be prepared for internal housing routing. If it is not, KS LEV Si Integra is not a suitable choice.
• Seatpost diameter: Check whether you need 27.2 mm, 30.9 mm, 31.6 mm or 34.9 mm. The diameter must match the frame exactly.
• Travel: 100–120 mm makes sense for smaller frames, XC, gravel or shorter riders. 125 mm is a more universal MTB value and 150 mm is more suitable for trail-oriented use and larger frames.
• Overall length: The post must fit into the frame and still allow correct saddle height when fully extended.
• Minimum insertion: Every post must be inserted at least to the marked minimum insertion line. With longer travel options, this can decide compatibility.
• Saddle height: Do not rely only on rider height. The important measurement is the real distance from the frame to the saddle rails at the correct setup.
• Lever and housing: Check the lever type on the specific version and keep housing routing smooth, without sharp bends.
• Seatpost clamp: An overtightened clamp can negatively affect dropper post function. Tighten it carefully according to the frame and post recommendations.
• Function after installation: After installation, check that the post returns smoothly, does not sink under load and that the handlebar remote has a natural feel.

In practice: first confirm that the frame supports internal routing. Then check the correct seatpost diameter, measure saddle height and available insertion depth inside the frame. Only after that should you choose the specific KS LEV Si Integra version by travel, length and use.