KTM Parts & Accessories
KTM Seat Height Chart
Every KTM SX, SX-F, and SX-E model, seat height compared. Find the right fit before you buy.
Two Different Journeys
This chart covers stock seat heights on new bikes. Here's where to go next, depending on what you actually need.
Shopping for a New KTM?
AOMC.mx can get you every part you need for your new KTM, but for a new bike, our partner at Waynesburg Powersports can get you any KTM model you're looking for.
SEE IN STOCK INVENTORY →Already Own One? Adjust the Fit
KTM makes low, standard, and tall replacement seats with different foam profiles for individual models, and several SX models have built-in seat height adjustability. AOMC carries genuine KTM seats and PowerParts to dial in your existing bike.
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Enter your rider's age and inseam to get a starting-point recommendation
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⚠️ We couldn't find an exact match based on those inputs. Please check the full comparison table below or browse KTM seats for guidance.
The SX Lineup at a Glance
Finding the right KTM means nailing engine size, riding style, and fit. Seat height isn't the single most important factor in choosing a bike, but getting it wrong can mean the difference between confident, fun riding and constantly being on your toes, especially if you're shopping for a youth rider. This guide breaks down stock seat heights across the KTM Motocross lineup, from 50 SX to 450 SX-F, giving you a solid starting point as you narrow down your search.
2-Stroke
4-Stroke
Electric
SX-E 2
470 mm / 18.5"
470–500 mm
~4–6 yrs*
Electric, 1.8kW
Entry-level electric step-up
* KTM doesn't publish an official age range for the electric SX-E line. These are directional estimates based on comparing seat height and adjustability to the equivalent gas-powered SX models above.
Full Comparison Table
Every KTM SX, SX-F, and SX-E model, seat height, and rough age guide side by side
| Model | Seat Height | Age Guide |
|---|---|---|
| 50 SX Mini |
653 mm (634–682 adj.) | 4–7 years |
| 65 SX Youth |
730 mm (715–760 adj.) | 7–10 years |
| 85 SX 17/14 Youth |
845 mm (33.3") | 7–12 years |
| 85 SX 19/16 Youth |
871 mm (34.3") | 9–15 years |
| 125 SX Full-Size |
958 mm (37.7") | 13+ years |
| 150 SX Full-Size |
958 mm (37.7") | 14+ years |
| 250 SX Full-Size |
958 mm (37.7") | 13+ years |
| 300 SX Full-Size |
958 mm (37.7") | 14+ years |
| 250 SX-F Full-Size |
958 mm (37.7") | 13+ years |
| 350 SX-F Full-Size |
958 mm (37.7") | 14+ years |
| 450 SX-F Full-Size |
958 mm (37.7") | 14+ years |
| SX-E 2 Electric |
470 mm (470–500 adj.) | ~4–6 years* |
| SX-E 5 Electric |
682 mm (634–682 adj.) | ~6–9 years* |
* Electric SX-E age guides are directional estimates, not official KTM figures. Seat heights sourced from KTM's official technical specifications for the current model year. Every full-size SX and SX-F model, 125cc and up, shares the same 958 mm seat height regardless of engine size — displacement changes power, not fit. Age guides are directional; inseam and riding experience matter more than age alone.
Fitment Disclaimer
Every rider is different. A low seat option or lowering kit can bring most models down further. If your rider is between sizes, we recommend leaning toward the smaller model for control rather than sizing up for room to grow. Contact the AOMC.mx support team before ordering if you're unsure.
Common Questions
Everything parents and riders ask before buying a KTM SX
Use the finder tool above for a starting point, then confirm on the bike itself. A good rule of thumb: your rider should be able to get the balls of both feet on the ground while seated, with enough leg bend left to catch themselves. If they're between two models, the smaller one usually offers better control for a new rider.
The wheel sizes are different (17"/14" vs. 19"/16"), and that changes the seat height: 845 mm on the 17/14 versus 871 mm on the 19/16. The 17/14 is the more approachable step up from the 65 SX, while the 19/16 rides closer to a full-size bike and suits taller or more experienced 85-class riders.
Yes, on several models. The 50 SX, 65 SX, and electric SX-E line all have factory-built adjustability, shifting the seat, bodywork, and shock mounting position to change seat height by 25–45 mm as your rider grows. On full-size and other models, KTM also offers low and tall replacement seat options, and suspension can be adjusted or valved lower by a qualified tech. Browse KTM Seats at AOMC for what's available for your model. This won't turn a full-size bike into a mini, but it can bridge a close call between two sizes.
Generally, no. A bike that's too tall or too powerful makes it harder to build confidence and control, which slows progress more than it helps. It's usually better to fit the bike to the rider today, use the built-in adjustability on models that offer it, and plan on moving up a size in a year or two.
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Yes. AOMC.mx is an authorized dealer for KTM OEM parts and PowerParts accessories. Everything purchased through AOMC is genuine KTM product. You can shop the full range of KTM OEM parts and PowerParts at AOMC.mx.