Mountain Race Shop™ — Shim Calculator © Mountain Race Shop™ / Fenian Park Trading Pty Ltd
Administrator
v3.2F
Ready · Global Suspension Knowledge
Administrator only — Reynolds, port velocity, cavitation index, solver diagnostics
Build
3.2C
Git
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Admin Portal

Rider & Bike

Fork Settings

Main Air Spring

Cartridge Pressurisation (ICS)

WP XACT AER and closed ICS cartridges use an ICS spring for cartridge support — not nitrogen gas pressure.

Cartridge Geometry & Hydraulics

Engineering Panel

Working cartridge hydraulics at 1.0 m/s shaft velocity. Run Preview Graphs or Simulate to refresh.

Working Cartridge Volume
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Displaced Volume
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Oil Turnover
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Mean Port Velocity
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Flow Demand
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Est. Cavitation Margin
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Confidence
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Assumptions / Warnings
Run a calculation to populate.

Shock Settings

3.10 : 1

Fork Dyno Data — Base Comp & Rebound

Enter positive force (N) for both compression and rebound. Rebound is plotted negative automatically.

Drag CSV here or click to upload (velocity m/s, force N)
V (m/s)Base Comp (N)Rebound (N)

Custom Stack Builder — Fork

Enter your own complete fork setup below. Click Overlay on Graph to see all custom circuits in bold red on the chart above.

Custom — Base Valve Compression

Dia (mm)Thk (mm)Qty

Custom — Low-Speed Valve (LSV) Adjuster

Dia (mm)Thk (mm)Qty

Custom — Mid Valve Compression

Dia (mm)Thk (mm)Qty

Custom — Rebound

Dia (mm)Thk (mm)Qty

Fork Shim Stacks

Base Valve — Compression

Dia (mm)Thk (mm)Qty

Low-Speed Valve (LSV) Adjuster

Dia (mm)Thk (mm)Qty

Mid Valve — Compression

Dia (mm)Thk (mm)Qty

Rebound

Dia (mm)Thk (mm)Qty

Shock Dyno Data — Comp & Rebound

Enter positive force (N) for both. Rebound plotted negative.

Drag CSV here or click to upload (velocity m/s, force N)
V (m/s)Comp (N)Rebound (N)

Custom Stack Builder — Shock

Enter your own complete shock setup below. Click Overlay on Graph to see all custom circuits in bold red on the chart above.

Bleed holes through the shock piston — applies to both compression and rebound.

Custom — Compression Main Stack

Dia (mm)Thk (mm)Qty

Custom — Compression Adjuster

Dia (mm)Thk (mm)Qty

Custom — Rebound

Dia (mm)Thk (mm)Qty

Shock Shim Stacks

Bleed holes drilled through the shock piston affect both compression and rebound circuits. Enter once here — the calculator applies it to both.

Compression — Main Stack

Dia (mm)Thk (mm)Qty

Compression Adjuster

Dia (mm)Thk (mm)Qty

Rebound

Dia (mm)Thk (mm)Qty

Digital Suspension Laboratory v3.2B

Workshop dyno bay: scrub shaft speed and watch tip lift, bleed vs stack split, port jets, ΔP colour, oil heat and cavitation margin update live. Physics is solved once — Engineering Replay frames drive the animation. Run Calculate on Fork/Shock to feed the lab.

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Engineering View — Animated Cutaway

Waiting for calculation…
Low P
Normal
High
Critical

Solid jets = main port / stack · dashed cyan = bleed · gold faces = tip lift · white flecks = cavitation risk

Live Graphs

Force vs Velocity

Force vs Travel (dyno loop)

Pressure vs Travel

Air Spring — Pressure / Rate vs Travel

Shim Tip Lift vs Speed

Flow Rate / Oil Temperature

Engineering Warnings

Run Calculate — we flag cavitation, port velocity, shim stress, hydraulic choke, oil temperature and fade.

Velocity Regimes (LSC / MSC / HSC)

Bleed & clickers own low speed. Stack opening owns mid. Ports & clamp own the square edge.

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Live Engineering Dashboard

Tracks the shaft-speed scrub — same numbers you’d glance at on a dyno screen.

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Shim Animation (independent faces)

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Pressure Map

Above / below piston · across ports · across shims · across bleed · across adjusters

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Air Spring Laboratory

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Solver

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Optimiser Visualisation

Original vs recommended stack after Calculate.

Digital Twin

AI Engineering Assistant

Ask workshop questions — harshness, packing, cavitation, springs, oil, ports, clickers, dyno.

Validation Engine

Every quantity is labelled Measured / Published / Calculated / Estimated with confidence.

Workshop Edition v3.2C

Shop operating system: intake the bike, link every change to a ride objective, check the stack is buildable, quote the job, capture before/after, and grow an evidence trail from rider feedback.

Guided Intake

Session Snapshots & Compare

No snapshots yet — Calculate on Fork/Shock, then capture BEFORE.

Customer Report

Generate after visit + health score.

CRM

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Suspension Timeline

Open a bike visit to see history.

Manufacturing Checker

Checks shim drawer, diameter order, clamp, bolt length and height budget on current stacks.

Cost Estimator

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Health Score & Geometry

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Rider Feedback (evidence)

Suspension Simulation

Select a track/terrain profile and run the simulation to see how your suspension responds. The animation shows fork and shock travel in real time with bottoming and force warnings.

Upload custom track CSV (time s, vertical velocity m/s)
Ready

Fork & Shock Animation

Warnings

Run a simulation to see warnings.

Optimizer Results

Click "Optimize" to compare your stack vs recommended/soft/stiff on the selected track.

Contribute Your Telemetry

Share your track data with the community. Your name will be credited on the track.

Drag your telemetry CSV here or click to upload

AI Suspension Engineer v3.2D

Start from the rider’s complaint — never the shim stack. Adaptive questions build a probability model; every recommendation carries why, effect, risks, alternatives, estimated force change, confidence and provenance.

No active diagnosis — start from the rider complaint.

1 · Rider Complaint

2 · Adaptive Interview

Answer terrain, speed, corner phase, braking, acceleration, landings, temperature and recent changes.

3 · Reasoning Chain

Complaint → Analysis → Physics → Calculations → Recommendation → Expected outcome

Complete the interview to build a transparent chain.

AI Workshop Assistant

Probability Engine

Ranked causes with confidence — base valve, mid valve, spring, oil height, clickers, geometry, tyres, rider technique.

Recommendations

Why · expected effect · risks · alternatives · estimated force · confidence · validation source.

Decision Tree

Select a common complaint fault tree.

Knowledge Base

Correlates existing records only — never invents certainty.

Workshop Learning

Record anonymised outcomes so the next diagnosis learns from timeline, snapshots and rider feedback — physics stays primary.

Suspension Engineering Platform v3.2E

Four bays under one roof — Engineering, Workshop, Intelligence, Business. Shared setup sheet, central manufacturer databases, physics-authoritative calculations. AI augments; it never replaces first principles.

Module Manifest

Loading platform map…

Oil Laboratory

Manufacturer presets + ISO VG temperature model. Change one grade, then re-trim clickers.

Piston & Flow Modeller

Q = A_displaced × v — explains port velocity before you open the press. Dyno/calc_engine still owns force.

Engineering Experiment Manager

Voice of the Workshop

Aggregated rider/tech themes — no PII.

Business Bay

Customer Success, Health Dashboard, Campaigns, Analytics — Administrator.

Open as Administrator to load success playbooks and health bands.

Global Suspension Knowledge v3.2F

Engineering fingerprints only - bike, stacks, oil, springs, complaint, outcome. Customer accounts stay in Database A. Physics remains the authority; aggregates only adjust confidence.

Loading dual-database status…

Capture Engineering Session

Uses current Fork/Shock calculator inputs. Rider mass is stored as a weight band only.

Engineering Search

Validation Levels

Statistics (anonymised)

Aggregates only - no workshop identity.

Data Governance

Future Partner API

Manufacturer / university / race-team scopes.

Calculation Report

Run a calculation first, then use browser Print → Save as PDF.