RadlBock started as a rocker plate for my own trainer. It has grown into a whole system: the platform that
makes indoor riding feel like riding again, the training plans I use to plan my season, and the app that
brings it all together.
The platform
Handcrafted rocker plate for road and mountain bikes: standing efforts, sprints and a feel for corners, indoors.
Each part works on its own: the platform fits any training software, and the app runs without a rocker plate.
The platform
The RadlBock platform is a handcrafted rocker plate that sits between your bike and indoor trainer, so
indoor riding feels like riding again.
Two base plates with spacer blocks: Let the top plate tilt and rock slightly – exactly the motion that happens automatically when riding outdoors, but is completely missing from conventional indoor training.
Adjustable gymnastics balls: Allow you to fine-tune the pressure for a more realistic riding feel.
Rotating front-wheel stand: Raises the front wheel to the correct height and allows gentle rotation, simulating steering and cornering for a more lifelike experience.
Works with both road bikes and mountain bikes, currently built for the Wahoo Kickr Core – adaptations for other popular trainers are planned.
More detail: prototype & material choice
Why multiplex wood for the base plates instead of a seemingly cheaper alternative?
MDF or particle board look attractive at first, but visibly give way after a few weeks
of repeated point-load stress and deform permanently. Multiplex wood stays dimensionally
stable and holds up to repeated load for years.
Three ways to get the platform
Plans
The complete build plan as a PDF – measurements, cutting plans, assembly instructions,
and a shopping list for balls, damping elements, and screws. You source the wood and
all parts yourself.
Materials: no physical parts included – the plan includes a shopping
list for wood, balls, damping elements, and screws.
Availability: instant digital download, worldwide.
Tools needed: a full workshop setup for cutting the wood (circular saw
or jigsaw, cordless drill/driver, sandpaper or an orbital sander), plus sourcing the
special parts (balls, damping elements) yourself from suppliers.
Included: just the build plan as a PDF – no physical parts.
Price:To be announced before the official launch.
Kit
Build plan plus a hardware kit (fasteners, spacer blocks, damping elements, balls) for self-assembly.
Materials: same basis as the Founder's Edition –
2 multiplex-wood base plates, roughly 800 x 650 mm each, 15–18 mm thick, rounded
corners (cut and sourced by the buyer).
Availability: worldwide shipping – small and light enough for standard parcel shipping.
Tools needed: circular saw or jigsaw (for cutting the wood),
cordless drill/driver, sandpaper or an orbital sander for rounding the edges,
tape measure and a spirit level.
Included: build plan, mounting hardware (incl. countersunk screws),
damping elements, gymnastics balls, a pump, and a pressure gauge.
Assembly requires basic woodworking skill – please don't underestimate the effort
involved. A step-by-step build guide is included.
Price:To be announced before the official launch.
Founder's Edition
Base plates hand-cut, rounded, and sanded – you assemble RadlBock yourself from
finished parts in just a few steps.
Materials: 2 multiplex-wood base plates (15–18 mm thick),
hand-cut, edges rounded and sanded, gymnastics balls for damping.
Availability: Pickup or shipping within DACH
(Germany, Austria, Switzerland) via freight forwarder – the pre-cut base plates are
too large and heavy for standard parcel shipping.
Exact regions and any exclusions will be confirmed before the official launch.
Tools needed: Just a cordless drill/driver for final assembly –
cutting, rounding, and sanding the wood parts is already done.
Included: pre-cut and sanded base plates, complete mounting
hardware, and gymnastics balls.
Customization: hand-painted one-of-a-kind design available on request.
Price:To be announced before the official launch.
The RadlBock app: plan, ride, understand
The app has two parts: a desktop app for the screen in front of your bike, which controls
your trainer and sensors, and the hub, which stores, plans and analyses your training –
in the browser, on any device.
Desktop app on the training screen: today's session, test and form – keyboard controlled.Hub: fitness, fatigue and form over months. Sample data from a fictional athlete.
Ride
Smart trainer and heart-rate strap connect via Bluetooth or ANT+. Structured workouts set the resistance
automatically, and GPX routes are ridden as a 3D landscape. Controlled by keyboard – no need to get off the bike.
Plan
Training calendar with times of day, your own workout editor and training zones. Your plan shows up as a
calendar subscription on your phone and work computer, and planned sessions can go straight to your Polar watch.
Understand
Every analysis comes with an interpretation, not just numbers: form and fatigue, personal bests, sleep, resting
heart rate and heart-rate variability. Guided tests – such as the lie-to-stand test – with a science-based
interpretation.
More than cycling
Runs, strength, yoga and mobility belong to the same plan: with a flow builder for your own yoga sequences
and video workouts sorted by sport.
Works with what you already use
Activities and measurements come in automatically from Polar, Garmin, Withings and Runalyze – including
your existing training history.
Your data stays yours
The hub runs on its own server instead of someone else's cloud. No advertising, no sale of data; export and
deletion at any time. Details in the app privacy policy.
Not publicly available yet. The app is in development and I use it in my own training every
day. A small group is testing it ahead of release – if you'd like to join, sign up for the app test in the form.
Training Plans & Self-Coaching
Alongside RadlBock itself, individual training sessions are available for download for
icTrainer – the software you play your workouts in. In future, the packages will also run directly in the
RadlBock app, with the plan in your calendar and an analysis of every session.
Instead of individual files, I'm planning target-group-specific packages – several
coordinated sessions for a concrete goal, assembled from my existing training library.
Examples from the planned catalog
These packages are illustrative examples – the final lineup, content, and prices aren't
set yet.
Basic Package
A balanced mix of FTP building/threshold, anaerobic sessions, base endurance, tempo,
and recovery – for road cycling and general training.
Multi-session package
MTB Package
A smaller, curated selection from the Basic package for MTB-specific needs, plus
strength and torque-focused sessions to prepare for uphill trail riding.
Multi-session package
FTP Test Package
Several Functional Threshold Performance (FTP) test protocols for different experience levels and time budgets – from
short tests to the classic 20-minute test.
Multi-session package
Cross-Training for Runners
Recovery and base endurance – joint-friendly training to complement your running
volume, without extra impact load.
Multi-session package
Checkboxes above add your interest directly to your sign-up below – no need to pick a
RadlBock model first.
Why RadlBock?
I built RadlBock because as a new father I needed short windows of time for training, and
conventional indoor training just never felt like cycling. Since then, my sit bones no
longer carry the full load, and standing efforts and sprints feel like movement again
instead of hitting a rigid stop.
My full story
I grew up on a bike – road, mountain, just being outside. Moving to the city for work
didn't leave much of that: no time, no green space at my doorstep for long rides.
Then COVID hit and I was stuck inside for good – on my brother's old, non-smart stationary
trainer. Loud, uncomfortable, never felt like cycling. The rocker-plate idea was there, but
it stalled: no budget for a finished one, no time or tools to build one myself. It never
really let go of me, though.
The turning point came when I became a father. I needed something that fit between naps or
late at night once the baby was asleep – short windows I wanted to actually use, without
driving anywhere first. So I built RadlBock.
Since then, my sit bones no longer carry the full load, and standing efforts and sprints
feel like movement again instead of hitting a rigid stop – and I'm still refining the
details.
What started as a build project has become more than just a platform: I now plan my season
and weekly sessions ahead of time, build my own workouts – and wrote the RadlBock app for it.
RadlBock became the foundation for the whole system – not just the furniture, but the
reason I actually enjoy riding indoors again.
If you've ever cut a session short because your sit bones or back gave out before your
legs did – that's exactly what RadlBock is for.
With conventional indoor training, the bike is rigidly connected to the trainer and the floor.
Every movement and power peak is transferred directly to the rider and the bike.
RadlBock changes exactly that:
More comfort: Elastic damping reduces pressure on sit bones,
back and wrists – making longer sessions noticeably more comfortable.
Natural movement: Side-to-side motion enables standing efforts
and sprints – much closer to the outdoor riding experience.
Active core: The freedom of movement engages your core muscles,
similar to riding outside.
Reduced stress on equipment: Power peaks are absorbed,
reducing strain on frames and components.
For runners, RadlBock is a way to increase weekly training volume without adding extra
load on tendons, ligaments, and bones – these adapt more slowly than muscle and
cardiovascular fitness do. That means more volume without raising injury risk from
ramping up load too quickly.
RadlBock is deliberately built in small batches, not for the mass market –
with materials that last, not the cheapest supplier.
Frequently asked questions
Does RadlBock fit my trainer?
RadlBock is currently designed for the Wahoo Kickr Core. Adaptations for other popular
smart trainers (Tacx, Elite, other Wahoo models) are planned – feel free to tell us which
trainer you use in the form below.
What exactly is included in the plans – and what do I need in addition?
The build plan (PDF) includes measurements, cutting plans, assembly instructions, and a
shopping list. No physical parts are included – you source wood, balls, damping elements,
and screws yourself using the list. Cutting the wood requires a full workshop setup. If
you'd rather not source and cut everything yourself, the Kit or Founder's Edition is a
better fit.
What exactly is included in the kit – and what do I need in addition?
Included are the build plan, mounting hardware (incl. countersunk screws), damping
elements, gymnastics balls, a pump, and a pressure gauge. You source and cut the two
multiplex-wood base plates yourself – that's what keeps shipping small, light, and
possible worldwide.
How much woodworking skill do I need for the plans or the kit?
The kit needs basic comfort with a cordless drill, a saw, and sandpaper. The plans add
the full wood-cutting step on top of that – don't underestimate the effort. If you're
unsure, the Founder's Edition is the alternative with no assembly required.
How long does assembling the kit take?
[PLACEHOLDER – a reliable estimate will follow after the first test builds.]
What happens if something doesn't fit during assembly (kit or plans)?
[PLACEHOLDER – support/return process to be defined before the official launch.]
Do I need the app to use RadlBock?
No. The platform works with any training software (e.g. icTrainer, Zwift, TrainerRoad).
The app is a separate offering and also runs without a rocker plate.
Which devices does the app support?
During testing, the desktop app runs on Windows and Linux and connects smart trainers (FTMS/FE-C) and
heart-rate straps via Bluetooth or ANT+. You open the hub in the browser on any device.
Where is my training data stored?
On the server the hub runs on – not with a cloud provider. What goes to third parties
(e.g. map services) and how to export or delete your data is described in the
app privacy policy.
Voices from the community
Shape RadlBock & stay informed
RadlBock is currently in the development phase. Reserve your spot below – for a model,
for training plans, for the app test, or all of them. You'll get a free icTrainer workout plus early access
to the first limited series.
