Adjust an indoor bike in a fixed order: first set the saddle height level with your hip bone, then position the saddle horizontally so that the knee is above the pedal axle, followed by the handlebar height and finally the pedal straps. At the lowest point of the crank, the knee should remain bent by 25 to 35 degrees. It takes five minutes and changes every ride afterward.
- Order: saddle height, saddle forward/back, handlebar height, pedal straps. If you start with the handlebars, you will end up adjusting everything twice.
- Saddle height: Top of saddle level with the hip bone, checked by ensuring 25 to 35 degrees of remaining knee bend at the lowest point.
- Saddle level: Cranks parallel to the floor, front knee vertically above the pedal axle.
- On the TWHEELS Indoor Bike, the handlebars are height-adjustable (overall height 112 to 121 cm), and the horizontal distance from the handlebars to the saddle is 32 cm.
- Honestly: The seat area will hurt for the first two to three weeks, no matter how precisely you adjust it. That goes away; the wrong saddle height does not.
Contents
- What is the correct order for adjusting an indoor bike?
- How do I find the right saddle height?
- How far forward or back should the saddle be?
- How high should the handlebars be?
- How do I fasten the pedal straps correctly?
- What resistance level should I start at?
- What does pain while riding mean?
- Frequently asked questions
- Our conclusion
What is the correct order for adjusting an indoor bike?
From bottom to top: saddle height, saddle horizontal position, handlebar height, pedal straps. This order is not a ritual; it is mechanics. Every change to the saddle height also shifts where your knee sits over the pedal and how far you reach for the handlebars. If you start at the top, you will have to do everything again.
This applies to every device with an adjustable saddle. The designs differ in their drive systems and seat angles, not in the adjustment logic. For comparison, we have presented the Indoor Bike, Spinning Bike, and Ergometer separately.
| Step | Adjustment | How you can tell it is right |
|---|---|---|
| 1 | Saddle height | Knee bent 25 to 35 degrees at the lowest point, pelvis does not tilt sideways |
| 2 | Saddle forward/back | Cranks horizontal, front knee vertically above the pedal axle |
| 3 | Handlebar height | Shoulders relaxed, elbows slightly bent, back long rather than rounded |
| 4 | Pedal straps | Ball of your foot over the pedal axle, foot sitting securely, toes unrestricted |
| 5 | Resistance | Smooth pedaling without your pelvis rocking, breathing still easy enough to talk |
Take the five minutes before your first ride, not halfway through it. A bike that is 90 percent pre-assembled is set up quickly. Adjusting it is the part no one can do for you.
How do I find the right saddle height?
Stand next to the bike: The top of the saddle should be roughly level with your hip bone—the bony prominence you can feel on the side of your hip. That is the starting point. Then sit on it and check.
Here is how to check: Sit upright, place your heel on the pedal and turn the crank to its lowest position. In this heel position, your leg should be almost fully extended without your hip tilting. If you then ride normally with the ball of your foot on the pedal, exactly the remaining 25 to 35 degrees of bend will be left—the best compromise between power and joint protection for most people.
Almost everyone sits too low the first time. It feels safe, but it costs strength and puts more strain on the kneecap. You can tell it is too high when your pelvis tilts from side to side with every rotation and you stretch your toes to reach the bottom.
For very tall people, the seat post is where many home fitness machines reach their limits. The TWHEELS Indoor Bike is approved for heights of up to 220 cm and a user weight of up to 120 kg.
«At 1.93 m, I usually have the problem with indoor trainers that the saddle does not go high enough. Here it fits: the seat post and handlebars extend far enough, so I do not sit on it like a frog. The crank length seems to be the standard 170 mm. After an hour, nothing hurts except my backside, but that is down to me.»
Arben, 5 stars, verified purchase
Once you have found the right height, remember the marking on the seat post. In a household with two riders, this saves two minutes of searching every time.
How far forward or back should the saddle be?
The starting point is having your knee above the pedal axle. Turn the cranks so they are horizontal to the floor, sit in your normal riding position and drop a plumb line from the front edge of the kneecap of your forward leg. A bunch of keys on a string is sufficient. If the string meets the centre of the pedal axle, the position is right.
If it hits clearly in front of that point, you are sitting too far forward, and the front knee is working at an unfavourable angle. If it hits well behind it, you are sitting too far back, pulling yourself upwards more with your hamstrings and reaching farther forward to the handlebars at the same time.
This rule is a starting point, not a law of nature. If you notice after two weeks that moving it back by one centimetre feels more comfortable, then that is your position. Change only one thing per ride; otherwise, you will not know afterwards what made a difference.
How high should the handlebars be?
As a beginner, set the handlebars at saddle height or one to two centimetres above it. The lower the handlebars, the more athletic and aerodynamic your position, but the more mobility you need in your hips and lower back. Anyone coming from a home office and sitting all day usually does not have that mobility—at least not on the first day.
On the TWHEELS Indoor Bike, the handlebar height is adjustable, so the overall height of the equipment ranges from 112 to 121 cm. The horizontal distance between the handlebar and saddle is 32 cm, and the handlebar width is approximately 47 cm.
| Handlebar position | Who it is for | Advantage | Disadvantage |
|---|---|---|---|
| Significantly above saddle height | People with sensitive backs, first few weeks, returning to training after rehabilitation in consultation with a professional | Upright position, little weight on the hands and neck | Less power when riding out of the saddle, unfamiliar for road cyclists |
| Our recommendation: at saddle height to 2 cm above it | The vast majority of beginners and occasional riders | A good compromise between power and comfort; works for 20 to 45 minutes at a time | A little too comfortable for ambitious interval training |
| Below saddle height | Experienced riders who cycle road bikes outdoors | Greater power transfer, familiar riding position | Places significantly more strain on the neck, shoulders, and wrists |
If you are wavering between two positions, choose the higher one. Work your way downward over several weeks; a tense neck will immediately cost you the next three workouts.
How do I fasten the pedal straps correctly?
The ball of your foot should be over the pedal axle—not the arch of your foot, and certainly not the heel. Only then tighten the strap, firmly enough to keep your foot from shifting when you pull the crank upward, but loosely enough that you can lift the strap with one finger.
The bike’s foot supports can be adjusted for shoe sizes up to 50. Wear sturdy trainers with a stiff sole. When barefoot, in socks, or in soft casual shoes, the pedal axle presses through, which is by far the most common cause of numb toes after twenty minutes. It is almost never the strap alone.
- Place the ball of your foot centrally over the pedal axle, with your foot pointing straight ahead.
- Close the straps loosely, get on, and tighten them while seated.
- Tighten both sides equally; otherwise one leg works differently from the other.
- Briefly check again after five minutes; the straps settle into place.
- If your toes go numb: stop, open the straps, and reposition your foot.
What resistance level should I start at?
Start in the lower third of the 32 levels and work your way up until your pedal stroke stays smooth and your pelvis no longer rocks. The correct resistance is the one at which you maintain a steady cadence and breathe audibly while speaking, without breaking off sentences. This is not a comfort criterion: at too high a resistance, you compensate for every misalignment with force and stop noticing it.
If you train by numbers rather than by feel, connect a chest strap. The wireless receiver is built into the display; a compatible heart rate monitor with Bluetooth and ANT+ costs CHF 69. The article about indoor trainers, calories, and weight loss explains how resistance, duration, and calorie consumption are related.
What does pain while riding mean?
Most complaints on an indoor bike have a mechanical cause. The table categorizes typical patterns, but does not replace a professional assessment: If you experience sharp, sudden, or persistent pain, stop and have it medically examined instead of continuing to adjust the seat post.
| Complaint | Common cause | First corrective step |
|---|---|---|
| Pain at the front of the knee | Seat too low or too far forward | Raise the seat by 5 to 10 mm, then check the knee-over-pedal position again |
| Pulling pain at the back of the knee | Seat too high or too far back | Lower the seat by 5 to 10 mm; your pelvis should no longer tilt sideways |
| Numb toes or balls of the feet | Soft sole, foot too far forward, straps too tight | Firm trainers, balls of the feet over the axle, loosen the straps by one notch |
| Tense neck and shoulders | Handlebars too low for your current mobility | Raise the handlebars, consciously keep your elbows slightly bent, and do not look upward continuously |
| Numb hands | Too much body weight on the handlebars | Keep your core engaged, raise the handlebars, and change your grip position regularly |
| Sore seat area during the first few weeks | An adjustment period, not necessarily an adjustment error | Increase riding time slowly; if it remains unchanged after three to four weeks, check the seat height and tilt again |
One point that many people misinterpret: A properly adjusted bike feels unfamiliar on the first day. If you have been sitting too low for three months, the correct height will initially feel strange. Give each change two or three rides.
Frequently asked questions
How often do I need to check the adjustment?
After the first three or four rides, check everything once; after that, only when necessary. Reasons include new shoes, a second rider in the household, a significant change in training volume, or a new complaint. Quick releases can settle over time, so briefly check before every ride that the seat and handlebars are really secure.
Is the bike also suitable for people who are 1.90 m or taller?
Yes. The TWHEELS indoor bike is approved for users up to 220 cm tall and weighing up to 120 kg; the seat post and handlebars can be extended accordingly. Tall riders should still perform the heel check: Anyone who habitually leaves the seat post too low loses the most power, especially with long legs.
Do I need clipless pedals or special cycling shoes?
No. The bike has pedal straps and footrests adjustable up to shoe size 50. A regular sneaker with a firm sole is perfectly adequate. Cycling shoes with a clip-in system only provide a noticeable advantage if you regularly do long sessions or intervals and actively use the upward pull.
How loud is the bike, and does it disturb the neighbors?
The manufacturer's specification is a maximum of 35 dB. That's quiet enough for an apartment in the evening; impact noise traveling downstairs is the more important factor: A mat under the device helps more than any noise rating. For space requirements in small apartments, we've published a separate article about fitness equipment for small apartments.
How difficult is it to move the bike?
The device weighs 40 kg and has a footprint of 115 × 60 cm. It has rubberized transport wheels. One customer wrote to us: Tilting it onto the wheels and moving it a little to the side for vacuuming works alone, but you shouldn't carry it.
Why does my butt still hurt?
Because the seating area needs time to get used to the pressure, which takes most people two to three weeks of regular sessions. Perfect adjustment shortens this phase; it doesn't skip it. Shorter, more frequent rides help more than one long session per week. If nothing has changed after four weeks, the saddle height is usually still the issue.
Our conclusion
Five minutes of adjustment can determine whether an indoor bike is still being used after three weeks. The order—saddle height, saddle position, handlebars, straps—is more important than any individual millimeter, and aligning with your hip bones plus maintaining 25 to 35 degrees of residual bend will get you very close. Fine-tune the rest during your first rides.
If you're just starting out and looking for a device that can be properly adjusted for heights of up to 220 cm, offers 32 resistance levels, and works even in a rented apartment in the evening with a maximum noise level of 35 dB: The Oak Wood Indoor Cycling Bike costs CHF 1'029, arrives 90 percent pre-assembled from the Swiss warehouse, and can be exchanged within 120 days if the riding position ultimately doesn't suit you.
About the author: Lena Brunner writes and tests for TWHEELS. For this article, she checked the manufacturer's specifications for handlebar height, handlebar width, and the distance between the handlebars and saddle against the product page on August 30, 2026, and based the adjustment steps on them. More on the author page.
