🚴 Fast, private and simple at home

Cycling is supposed to feel good

Most cyclists assume aches and numbness are just part of riding. In reality, your setup is simply fighting your body. Record a quick 15-second video on your phone to get into the comfortable window in minutes.

Try 1 Free AI Fit Session
1-Year PRO Pass · £11.90
✓ 100% on-device privacy
✓ No sensors or markers needed
✓ Plain-English millimeter guidance

Bike and body in perfect sync

Most riders think sore knees, tingling hands, or an aching neck are just part of cycling. In reality, your body is simply fighting a setup that's off by a few millimeters.

Sore knees on climbs and long rides

You don't have bad joints or poor fitness. A saddle that is even 5–10mm too low compresses the front of your knee 5,000 times an hour. If it's too high, your hamstrings overstretch.

Tingly fingers and upper-body tension

If your palms go numb or your neck aches after 30 minutes, you're carrying too much upper-body weight. Handlebars set too far away or too low pinch sensitive nerves in your hands.

Constant shifting, chafing and soreness

Constantly squirming to find a good position? A saddle that is too high or tipped forward forces your hips to rock side-to-side on every downstroke, causing painful chafing and lower back stiffness.

⚙️ ⚙️ Fast, private and simple

How Bikerly works

No expensive sensors, no studio trip, and no biomechanics degree needed. Just 4 simple steps at home.

1 No studio needed

Record a quick 15-second video

Prop your phone on a chair or shelf 2.5–3 meters to your side, level with your bike crank. Pedal naturally for 15 seconds on an indoor trainer, rollers, or a smooth outdoor pass in your normal cycling gear.

Cyclist recording video for at home AI bike fit
2 100% in-browser privacy

AI maps your natural motion

Our computer vision tracks your body landmarks through each pedal rotation directly on your device. Your video is processed locally in your browser - it is never uploaded or saved to external servers.

Real-time AI skeletal tracking and pose estimation in browser
3 The optimal window

See if you're in the comfort window

Every rider is unique, but sports science shows a clear optimal window for knee extension, hip angle, and reach. Bikerly immediately shows where your position is causing strain and where you can gain easy comfort.

Bikerly fit scores and knee extension angle analysis
4 Simple DIY tweaks

Turn a bolt and feel the difference

Get plain-English instructions on exact millimeters to raise or lower your saddle, slide rails, or adjust stem spacers. Make the tweaks with a standard 4mm/5mm Allen key, re-test, and compare with the Before/After split slider.

Desktop dashboard showing millimeter adjustments and before/after comparisons
📐 The optimal comfort window

Why 10mm changes everything: The comfort sweet spot

Every cyclist's body is built differently, but sports science defines a clear safe window for pain-free pedaling. Here's how small millimeter adjustments solve big aches:

Bottom of pedal stroke (6 o'clock)

Knee extension angle

140° – 150°

The key to pain-free knees. If your saddle is even 5–10mm too low (under 138°), you compress your knee cap 5,000 times an hour. If it's too high (over 152°), you strain your hamstrings and rock your hips.

Adjusts: Saddle Height (mm)
Top of pedal stroke (12 o'clock)

Hip angle and pelvic balance

> 65° – 70°

Relieves hip pinch and lower back strain. When your pedal reaches the top position, an acute hip angle pinches hip flexors and rounds your lower spine. Sliding your saddle back opens this angle for smooth power.

Adjusts: Saddle Fore/Aft (Setback)
Cockpit ergonomics

Shoulder and cockpit reach

85° – 90°

Stops hand numbness and neck tension. Determines how much upper-body weight is dumped onto your palms. A comfortable reach lets your elbows stay relaxed to absorb road vibrations, keeping your fingers and shoulders happy.

Adjusts: Stem Length & Spacer Stack
🤝 Radical honesty

Do you really need a £300 studio fit?

Pro studio fitters are irreplaceable if you are an elite racer or recovering from complex surgery. But for 90% of cyclists who want to eliminate pain on weekend rides, Bikerly gets you into the 85–90% comfortable sweet spot at home in 10 minutes - before you ever spend hundreds.

Feature / capabilityBikerly AI fitPhysical studio fitDIY guesswork
Best forWeekend warriors, commuters & sportive ridersElite racers, custom orthotics & injury rehabTrial-and-error
Cost1 Free · £11.90 PRO 1-Year£180-£350 per sessionFree (Cost of pain)
Dynamic motion analysis✓ 33 Body Landmarks✓ Motion Capture✗ Static Only (Mirror)
Privacy & video handling✓ 100% In-Browser (Never Uploaded)Studio Video RecordedN/A
Time & location✓ 10 min at home anytime2–3 hours in studio + travelHours of trial & error
Before / after verification✓ Interactive Split SliderSingle follow-up session✗ Guesswork
Unlimited tweaks & swaps✓ Unlimited for 1 YearPaid follow-up neededEndless guessing
⭐ ⭐ Rider stories

What our riders say

From weekend warriors to century riders, see how getting into the comfortable window transformed their rides.

★★★★★
Best money spent

"Easily the best money I've spent on my bike."

"A local shop quoted me £280 for a studio fit, which felt crazy for my £750 endurance bike. Bikerly showed me in 15 seconds that my reach was way too stretched and my saddle was tilted back. Swapped a stem spacer and leveled the saddle. Completed a 60-mile club run on Sunday with zero lower back stiffness."

Dave M.
★★★★★
Knee pain relieved

"It took me half an hour, but the result is awesome - no more knee pain."

"I used to get a sharp twinge at the front of my knee every time I pushed on climbs, and I assumed I just had bad joints. Recorded a quick 15-second clip on my turbo trainer. Bikerly showed my knee angle was too compressed at the bottom. Raised the saddle 8mm and moved it back 3mm. It took me half an hour, but the result is awesome - no more knee pain!"

Sarah K.
★★★★★
Hand numbness fixed

"It's incredible what a 10mm saddle height difference can make."

"I've been riding for 4 years and always accepted that tingling, numb fingers after 40 minutes were just part of cycling. Turned out my saddle was 11mm too high, making my hips rock and dumping all my upper body weight straight onto my palms. Lowered it by 10mm as recommended, and it's incredible what a difference it made. Numbness is completely gone."

Marcus T.
💎 Simple and transparent

Choose your plan

Start for free with your first AI Bike Fit, or upgrade to Bikerly Pro for full unlimited access. No recurring subscription surprises.

Free

Starter

Essential bike maintenance tracking and your first AI bike fit session.

£0/ forever
No credit card required
  • 1 Free AI Bike Fit full analysis
  • 100% private in-browser AI video tracking
  • Up to 2 bikes in your digital garage
  • Strava auto-sync & component wear tracking
Get started for FREE

Bikerly Pro

1-Year Pass

Unlimited AI fittings, exact millimeter adjustments, and full garage capacity.

£11.90/ 1-Year Pass
approx. €13.90 / $15.90 · One-time payment · No recurring fees
  • Unlimited AI Bike Fittings across all your bikes
  • Millimeter-exact adjustments (saddle, stem, stack)
  • Interactive Before & After split comparison slider
  • Critical Keyframe Inspector (TDC, BDC, power phase)
  • Up to 100 bikes in your garage
Get 1-Year PRO Pass

Frequently asked questions

Honest answers about AI bike fitting, our pricing, and how Bikerly gets you into the comfortable riding window.

No, and we don't pretend it does! A top in-person bike fitter can analyze physical asymmetries, structural foot collapse, custom orthotics, and past orthopedic injuries. If you are an elite racer or suffer from severe medical pain, a £250–£350 studio fit is worth it. But most recreational riders and weekend warriors don't need a lab appointment just to stop their knees hurting or hands going numb - they simply need their saddle and bars in the correct biomechanical window. Bikerly gets you into that 85–90% sweet spot in 15 seconds at home, before you consider spending big money on a studio.
Yes, you are who Bikerly was built for! Pro racers already have dedicated mechanics and team fitters. Everyday cyclists, commuters, and weekend riders often ride with saddles that are 15-20mm off, assuming that aching knees, sore necks, and tingling fingers are just normal fatigue. Getting into the right comfort window transforms your weekend rides from painful grinds into pure fun.
Yes, it is incredible what a 10mm difference makes! At an average cadence of 80–90 RPM, you pedal around 5,000 times per hour. If your saddle is just 10mm too low, you compress your patella tendon on every single one of those 5,000 strokes. Moving into the optimal window immediately takes strain off your joints and lets your muscles work efficiently.
You record a short 10–15 second side-view video of yourself pedaling on an indoor trainer, rollers, or during a smooth outdoor pass. Our in-browser computer vision tracks key body landmarks (hips, knees, ankles, shoulders, elbows), compares your joint angles against sports-science benchmarks, and provides clear millimeter-exact recommendations on saddle height, saddle fore/aft, and cockpit reach.
Just your smartphone camera, your bicycle, normal cycling clothing (shorts/bibs and shoes), and standard 4mm or 5mm Allen keys for making bike adjustments. To record, place your bike on an indoor trainer, rollers, or lean against a trainer/turbo while spinning naturally.
Yes! Every free account includes 1 full AI Bike Fit analysis session. You can upload a video, inspect your joint angles, and see how close you are to the optimal comfort window without spending anything. Upgrading to Bikerly Pro unlocks unlimited fittings, millimeter-exact prescriptions, and the Before & After comparison tool.
Bikerly Pro is just £11.90 (approx. €13.90 / $15.90) as an honest 1-Year Pass. It includes 12 months of unlimited AI Bike Fittings across all your bikes, exact millimeter adjustment prescriptions, the Before & After split slider, garage capacity for up to 100 bikes, and a 100% ad-free experience.
No! We believe in transparent, honest pricing. Bikerly Pro is purchased as a 1-Year Pass with a single payment. It never automatically charges your card at the end of the year - you remain in complete control when you choose to renew.
Yes, 100%. All AI computer vision tracking runs locally inside your web browser on your device. Your video is never uploaded or saved to any external server, guaranteeing complete personal privacy.
None whatsoever. Our computer vision model automatically detects your joint landmarks directly from normal video, eliminating the need for sticky dots, wearable sensors, or calibration boards.
Bikerly makes bike maintenance effortless. Connect Strava in one tap, and every ride automatically credits mileage to that bike and its attached components. You'll know exactly when your chain needs checking (0.5% wear), when tubeless sealant is drying up, or when brake pads need inspection.
Bikerly is a modern progressive web application that runs directly in your browser on phone, tablet, or desktop at app.bikerly.app without needing to download anything from an app store.

Ready for your best ride yet?

Grab your phone, record a 15-second pedal stroke, and get into the comfortable window today.

Launch free AI bike fit