42 free video tutorials, each tagged by level
Reviewer Best sequenced of the bunch — start here if you've never tuned a derailleur before.
Moderator Full start-to-finish rear derailleur tuning process — hanger check, alignment, B-tension, H-limit, cable tension — the most complete adjustment walkthrough in this batch.
Reviewer Very well organized, genuinely useful troubleshooting.
Moderator Comprehensive troubleshooting guide to fixing bike gears - chain wear, cleaning, indexing, cable tension, mech hanger.
Reviewer Follow this step by step and you'll actually understand what each adjuster does, not just guess.
Moderator Complete start-to-finish indexing walkthrough: cable condition, hanger straightness, high/low limit screws, cable tension — this is the textbook definition of the skill.
Reviewer Good for knowing when to grab the barrel adjuster vs when to just buy a new chain.
Moderator Direct follow-on covering derailleur indexing/adjustment as the fix for chain skip, plus chain and cassette wear diagnosis — squarely part of gear adjustment and maintenance.
Reviewer This is how a mechanic actually diagnoses a shifting problem — great process to copy.
Moderator Systematic diagnostic walkthrough of shifter, derailleur limit screws, and cable tension when gears won't shift — this is exactly what adjusting your gears covers.
Reviewer Precise enough to trust, right down to the torque spec on the cable bolt.
Moderator Entirely dedicated to limit screws (H/L) and indexing via the barrel adjuster - the single most complete and procedurally correct explanation of gear adjustment in this batch.
Reviewer Detailed, accurate, and actually teaches you to do the job.
Moderator This is exactly the skill -- cable tension, barrel adjuster indexing, and the L-limit screw, which is the actual mechanical process of adjusting your gears.
Reviewer Best-in-class practical walkthrough -- tells you exactly which screw fixes which problem.
Moderator Entirely a step-by-step tutorial on adjusting front and rear derailleurs via the barrel adjuster and H/L limit screws -- exactly the skill.
Reviewer The B-tension explanation alone makes this worth watching before you touch a screwdriver.
Moderator Opens by naming and explaining every adjustable part of a rear mech (limit screws, B-tension, barrel adjuster, cable clamp) before touching anything, then does limit screws, B-tension gap, and indexing in that order. This is a full anatomy-to-execution lesson on gear adjustment specifically.
Reviewer Clear, correct, and genuinely teaches the process.
Moderator This is literally mechanical gear adjustment -- barrel adjuster tensioning, jockey wheel alignment to the cog, B-screw distance. As on-the-nose as this skill gets.
Reviewer Logical, practical troubleshooting sequence.
Moderator Direct troubleshooting of poor shifting caused by derailleur adjustment issues - dirty cables/housing and worn chain.
Reviewer Explains the why, not just the turn-this-screw, so it actually sticks.
Moderator This is exactly what indexing is - GCN walks through what indexing means, checking limit screws first (important prerequisite most beginners skip), then the barrel adjuster process cog by cog on both little and big ring. Zero filler, zero tangents, entirely about this sub-skill.
Reviewer Systematic, testable, genuinely useful diagnosis.
Moderator Systematic troubleshooting of shifting problems -- worn chain, stiff links, worn cassette teeth, misaligned derailleur via barrel adjuster, bent hanger, cross-chaining wear. This is adjustment/diagnosis at its core.
Reviewer Practical, correct, catches real mistakes.
Moderator Squarely about using your gears well -- front/rear shifter roles, avoiding cross-chaining, cadence targets, shifting before climbs and before stopping in town.
Reviewer Clear, accurate, practical -- strong lesson.
Moderator Names every drivetrain part, explains chainring/cassette numbering and ratios, and gets into actually operating mechanical shifters -- squarely on-topic and thorough.
Reviewer Excellent foundational teaching, well structured.
Moderator Comprehensive explainer of the whole gearing system -- drivetrain parts, mechanical vs electronic, gear ratios, high/low gear definitions, cadence-driven shifting. Squarely the foundation of this skill.
Reviewer Covers both shift directions properly, unlike a lot of these quick clips.
Moderator Textbook barrel-adjuster walkthrough - stand the bike, test each gear, quarter-turns to fix under- or over-shifting. This is the sub-skill, nothing else.
Reviewer Clear, well-paced, actually explains the vocabulary as it goes.
Moderator Deliberately structured as a complete front+rear derailleur and shifter adjustment tutorial, explaining every adjustment point (limit screws, B-tension, barrel adjuster, clutch) before executing it live on a bike stand.
Reviewer Clear, practical step-by-step with a fallback check.
Moderator Direct step-by-step mechanical adjustment of a Nexus 3-speed hub - squarely on topic.
Reviewer Detailed, precise front derailleur walkthrough with real numbers to aim for.
Moderator Fully focused on front derailleur setup -- mounting height/angle, limit screws, cable tension -- a core piece of overall gear adjustment even though it doesn't touch the rear derailleur.
Reviewer Clear, well-explained foundation for how gear adjustment actually works.
Moderator Whole episode is dedicated to explaining shifters, cables, barrel adjusters and front derailleur setup -- squarely on-topic for adjusting gears.
Reviewer Clear, correct, well-organized lesson.
Moderator Explains why gears exist, higher/lower gear use cases, both shifter types (trigger and twist), and exactly how to operate them -- comprehensive, on-topic fundamentals.
Reviewer Catches a real, common mistake -- good coaching.
Moderator A specific, real shifting-technique tactic for getting out of the saddle -- shift 1-2 gears harder before standing, then back to easier once seated and settled. Squarely on-topic and non-obvious.
Reviewer Practical, correct fix for a common problem.
Moderator Direct, correct troubleshooting for a shifting-tension problem via the barrel adjuster -- squarely mechanical gear adjustment.
Reviewer Clear steps, but light on explaining the why.
Moderator Specific step-by-step mechanical adjustment of Brompton hub gears - squarely on topic.
Reviewer Solid demo, if a little rambling.
Moderator Specifically about front derailleur trimming, a nuanced adjustment topic closely tied to gear adjustment.
Reviewer Clear enough to actually follow in your garage.
Moderator A literal numbered step-by-step for a slipping/skipping drivetrain — squarely the gear-adjustment sub-skill, nothing else going on.
Reviewer Practical, addresses real beginner mistakes well.
Moderator Explicitly about correct gear-changing technique and two common newbie mistakes - squarely on topic.
Reviewer Actually explains WHY chains wear and wreck your shifting - real mechanic knowledge.
Moderator Focused on why gears skip and ghost-shift, and walks through chain wear as the root mechanical cause - that's diagnosing and fixing a shifting problem, core to adjusting your gears, even though the excerpt leans into chain wear before getting to the adjustment steps.
Reviewer Solid, correct, actionable -- good short lesson.
Moderator Squarely a shifting-technique tip video: anticipate shifts before you need them, ease off pedal pressure while shifting, use small frequent changes for cadence smoothness.
Reviewer Clear and genuinely useful for a new rider.
Moderator Covers using gears effectively while riding (cassette vs chainring, cadence, avoiding cross-chaining) rather than mechanical adjustment, but is squarely 'how to work your gears'.
Reviewer Clear visual demo of chain line, useful.
Moderator About using gears correctly (chain line, avoiding cross-chaining, shifting under load) - adjacent to mechanical adjustment but squarely about gear usage.
Reviewer Real technique, a bit unclear on the fundamentals.
Moderator Squarely mechanical adjustment -- H/L limit screw alignment of the jockey wheel with the cassette on a rear derailleur.
Reviewer Shows you what troubleshooting actually looks like, warts and all.
Moderator Full walkthrough of mounting a new derailleur, setting H/L limit screws, hooking up the cable and indexing - all squarely gear adjustment. Slightly diluted by being framed around installing a whole new derailleur rather than pure adjustment, hence not a full 2.
Reviewer The kind of memory trick that actually saves you next time you're stuck.
Moderator A specific, common gear-adjustment symptom (slow shift toward the spokes) with a fix — squarely on the sub-skill.
Reviewer Correct but only tells you half the story - one direction only.
Moderator Short and entirely about using the barrel adjuster to fix a shift that won't move into an easier gear. Right skill, right fix.
Reviewer Good info, a bit rough around the edges.
Moderator Covers left/right shifter roles, avoiding cross-chaining, and basic troubleshooting causes (bent hanger, cable tension) when shifts don't land cleanly -- solidly on-topic fundamentals plus a bit of adjustment troubleshooting.
Reviewer Correct but pretty brief -- one idea, well made.
Moderator Core shifting-technique principle -- shift timing depends on terrain and cadence, anticipate the climb, and don't shift under high chain tension.
Reviewer You'll see the motions but not really learn the why.
Moderator Covers both rear and front limit screw adjustment plus barrel adjuster on a specific bike, so it is on-topic gear adjustment throughout, just narrower and more meandering than the top entries.
Reviewer Accurate but very shallow -- a quick tip, not a full lesson.
Moderator On topic -- explains why gears go out of adjustment (cable stretch) and how to use the barrel adjuster to fix it -- but it's short and covers only that one adjustment, nothing on limit screws or derailleur setup.
Reviewer High-quality mechanic content, different specific job.
Moderator This is really about fitting a wider-range cassette and longer-cage derailleur to get lower gears -- a parts upgrade job, not adjusting your existing gears. It ends with chain-length setting, which does overlap with the adjustment process, so I won't call it fully off-topic.
Reviewer Thin teaching - you watch him fix his bike more than learn how to fix yours.
Moderator Squarely rear derailleur limit screw and cable tension adjustment on a specific budget bike, stays on topic the whole time.