The Guy

I’ve spent over 30 years wrenching in the cycling world — starting out in my parents’ bike shop back in the 1980s and working my way up as a professional mechanic. Now, as “The Guy” behind I Know A Guy Bicycles, I bring that decades-deep expertise straight to you on YouTube — repairs, restorations, rebuilds, and no-BS industry talk — taking the mystery out of bikes one video at a time.

Justin Bolinger I Know a Guy Bicycles

Bike Repair, Done Right

I’ve spent 30+ years wrenching on bikes — from my parents’ shop in the ’80s to a career as a professional mechanic — and that’s the expertise behind every tune-up, overhaul, and detail job at I Know A Guy Bicycles. No upsells, no guesswork, just honest bike repair from someone who still loves the craft — pick your service tier below and let’s get you rolling again.

Tune-Ups

Three tiers to match how hard you ride

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Choose Your Tier

Turnaround: 1–5 business days depending on tier

  • Re-Fresh $59

    Brake & shift adjust, full bolt check, tire and safety inspection.

  • Standard $99

    Drivetrain detox, precision indexing, wheel truing, bearing inspection, static bike fit.

  • Magic $149

    Ultrasonic drivetrain restoration, hub service, full frame inspection & protective polish.

Heavy Service & Overhaul

Master mechanic teardown & rebuild

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Choose Your Tier

Turnaround: 3–7 business days depending on tier

  • Comprehensive Overhaul $199

    Full teardown, all cables & housing replaced, bar tape installed, complete safety check.

  • Full Rebuild $399

    Comprehensive Overhaul plus hydraulic brake bleed, tubeless setup and service, drivetrain sonic clean.

  • Pro Custom Build $449

    Frame-off rebuild for project bikes — full strip, service, and reassembly to spec.

Ceramic Coating & Detailing

Professional ceramic coating for bicycles

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Choose Your Tier

Turnaround: 3–7 business days depending on tier

  • New Ride Enhancement Package $199

    New Bike Build, Professinal Adjustments, and Chain Waxing — plus professional ceramic coating for UV protection & scratch resistance.

  • Ceramic Shield $199

    Detail Wash plus professional ceramic coating for UV protection & scratch resistance.

  • Comprehensive w/Ceramic Coating $349

    Ceramic 9H Shield plus hot wax chain treatment and a full component polish.

Trusted Partners

These “Trusted Partners” are the small businesses that make up the real heart of cycling — every one vetted, every one worth your business.

Bivo

Trusted Partner

Bivo

Stop sucking, start flowing. Bivo's stainless steel bottles use a gravity-fed design that delivers water fast when you need it most — no squeezing, no straw, just a real drink on the fly.

Vital Bike Chains

Trusted Partner

Vital Bike Chains

A new chain isn't ready to ride — it's coated in shelf-life grease that grinds your drivetrain down. Vital strips it and hot-waxes it instead: silent, clean, and built to make your cassette last.

Code GUY10 — 10% off
Bicycle Wheel Wharehouse

Trusted Partner

Bicycle Wheel Warehouse

Skip the overseas close-out wheels repackaged and resold. Every wheel here is hand-built in-house, checked and rechecked for spoke tension and trueness — specs that actually make sense.

Code IKAG25 — 25% off $99+
Gravel Threads Designs

New Trusted Partner

Gravel Threads Designs

Gritty, soul-injected graphics like "Bike Tree" and "Mosh Pit Mechanic," printed on soft-touch tees built for a full day under the bike stand and a post-ride tailgate after.

Code IKNOWAGUY15 — 15% off

Frames, Parts & the Products I Actually Use

Here are bikes, frames, and parts for sale that I’ve personally gone over and vetted — nothing leaves this shop unless I’d put it on my own build. And if you’re curious about the polishes and tools I reach for in the shop and in my videos, check those out too — same stuff, same standards, no BS.

Bikes & Frames

Vetted rides and framesets — personally gone over before they ever hit the shelf.

Shop Bikes & Frames

Parts

The components I trust enough to run on my own builds.

Shop Parts

Use What I Use

Polishes, tools, and gear straight from the shop bench and the videos.

Shop My Picks
Testimonials
Happy Clients

“Justin is great to work with and very knowledgeable. He got my husband’s 20 year old Giant bike back up and running just like new!”

Kristi N, Loveland

“Purchased some pedals from justin on market place, was by far the fastest shipping seller I’ve ever dealt with.”

Casey B

Justin is fast and knowledgeable. He has tuned both my bikes several times, and I wouldn’t go anywhere else.

Cher Lulu S, Denver

Justin has tuned up several of our bikes. He does a great job and goes above and beyond to make sure you are road ready!

Jackaline R, Loveland