Fit the pivot, map the sweep
Best Leg Extension Machines
Choose the resistance system and adjustment record before the upholstery. A bench attachment, plate-loaded standalone and selectorized station ask for very different space, equipment and service commitments.
We checked current manufacturer specifications, compatibility, stock and written support. We did not assemble, load, use, noise-test or fit-test these machines. Pad geometry, unloaded resistance, motion feel and fit still require an in-person trial or written answers from the seller.
Researched .
REP BA-5010 is the compact choice only for three named REP benches. Titan 401556 is the in-stock value standalone. Bolt Shock is a US commercial stack with a small public spec set. Evolve UL-250 is the best-documented current EU selectorized route.
- Compatible bench already owned: REP BA-5010
- Plate-loaded standalone: Titan SKU 401556
- US commercial selectorized: Bolt Shock Series
- EU selectorized with detailed specs: Evolve UL-250
Avoid this category if you cannot comfortably match the seat, movement pivot and roller with the machine unloaded. Do not buy one as self-directed rehabilitation equipment.
Verify before buying: exact resistance and user limits, unloaded starting resistance, adjustment ranges, working envelope, floor fixing, doorway path, assembly, parts and regional warranty.
Compare the four stations
Keep four different weight numbers separate
Plate loaded
Resistance comes from loose plates placed on a weight horn.
Horn diameter, usable length, plate radius and available plates become part of fit and cost.
Confirm 1-inch or Olympic diameter and map the largest plate beside the frame.
Plates on a lever do not guarantee that the stated plate mass is felt identically throughout movement.
Selectorized stack
A pin selects plates from a built-in guided weight stack.
It changes resistance quickly but adds height, mass, cables and service parts.
Record stack increments, minimum setting, ratio and replacement-parts path.
A larger stack does not prove a better fit or resistance curve.
Loadable capacity
The maker's limit for resistance placed on an attachment or loading system.
It governs equipment loading, not the person's body mass.
Use only the exact maker label and ask for clarification when “weight capacity” is ambiguous.
It is not interchangeable with maximum user weight.
Maximum user weight
The highest body mass the maker permits on the seat and frame.
It is a separate structural limit from plates or stack size.
Include clothing and ordinary carried items, then preserve margin rather than shopping at the exact boundary.
A 250-pound stack does not imply a 250-pound user limit.
Starting resistance
The resistance present before extra plates or stack increments are selected.
Arms, cams, cables and counterweights can make zero plates feel unlike zero resistance.
Ask the maker for the unloaded value or arrange an unloaded trial.
The first labeled stack plate may not describe the whole starting load.
Resistance ratio
A cable or lever relationship between selected weight and force at the machine's drive point.
It helps interpret stack labels but does not describe the complete feel across an arc.
Compare ratios only after confirming the maker measures them the same way.
A 1:1 label does not erase cam and limb-length effects.
Start-angle adjustment
A setting that changes where the movement arm begins its travel.
It may help different users enter and leave the station without forcing one fixed start.
Test every intended user unloaded and reject settings that cannot be reached comfortably.
More numbered holes do not guarantee suitable anatomy or a clinical range of motion.
Current stock had to meet usable fit evidence
REP and Titan are major home-strength specialists with exact technical and support records. REP's 78-review maker signal and dual US/EU availability establish current interest, not performance. Bolt adds an in-stock commercial US stack. Evolve publishes the strongest metric record in the group and showed three EU units in stock.
Body-Solid GCEC340B was temporarily out of stock. Bells of Steel Basilisk was unavailable with a future preorder date, and Force USA Solitude said sold out/preorder. They remain exclusions rather than recommendations built around hoped-for delivery.
System, fit record and floor commitment
| Machine | Resistance | Published body | Fit evidence | Buyer lane |
|---|---|---|---|---|
| REP BA-5010 | Dual plate horns, bands, optional cable; 250 lb loadable | Attachment: 33.3 x 25.5 x 36.2 in | Extension roller center 12.5-17.5 in; three named benches only | Existing REP bench |
| Titan 401556 | Plate loaded; maker labels 300 lb capacity | 36 x 42 x 39 in; 108 lb | 7 seat depths, 7 knee-pad positions; approximate 5 ft-6 ft 1 in user range | Value standalone |
| Bolt Shock | 230 lb selectorized stack | 56 x 50 x 61 in | Public page omits user limit and adjustment counts | US commercial quote |
| Evolve UL-250 | 110 kg stack; 5 kg minimum; optional 122.5 kg | 1530 x 1170 x 1602 mm; 167 kg | 8 back, 5 thigh, 7 ankle and 7 start-angle positions; 180 kg user max | Documented EU stack |
Buy the complete station, not the headline machine
REP BA-5010: compact only inside its ecosystem
Best fit: owners of a REP BlackWing, Nighthawk or AB-5000 bench who can store a separate wheeled attachment.
REP publishes exact bench compatibility, roller-center adjustments and a 250-pound loadable limit, with current US and EU paths.
Advantage: plate, band and optional cable resistance avoid a permanent stack tower.
Tradeoff: the attachment dimensions omit the bench, user, plates and cable clearance of the working station.
Skip it if: your bench is not one of the three named families; REP does not guarantee third-party fit.
Then consider: Titan 401556.
REP showed shipping in 24-48 hours and 78 reviews. Those reviews establish activity around the model, not verified motion quality.
Titan 401556: the compact plate-loaded standalone
Best fit: a home gym that already owns Olympic plates and wants a dedicated seated combo.
The in-stock SKU has published frame gauge, dimensions, seat/pad adjustments and an approximate user-height range.
Advantage: 36-inch depth and 108-pound machine mass are easier to route than a commercial stack.
Tradeoff: Titan's 300-pound “weight capacity” is not separated into a plate limit and user limit.
Skip it if: you are outside the approximate 5-foot to 6-foot-1 range or cannot obtain written capacity clarification.
Then consider: Evolve UL-250 for separately labeled limits.
SKU 401556 and MPN LEGEXTCRLv2 match current product and support records; fit remains a trial question.
Bolt Shock: a commercial quote needs more than a stack number
Best fit: US studios wanting an in-stock 230-pound pin stack and commercial-looking enclosure.
Bolt showed the exact Shock combo in stock with shipping included and published 56-by-50-by-61-inch dimensions.
Advantage: pin changes and an enclosed stack suit repeated shared-user changes.
Tradeoff: the public page omits machine mass, user limit, starting resistance and adjustment counts.
Skip it if: the seller will not provide a written spec sheet, assembly/service plan and warranty for your use class.
Then consider: Evolve UL-250.
Orderability and core dimensions are strong; fit and support confidence stays conditional on a pre-purchase quote.
Evolve UL-250: the most complete European specification
Best fit: an EU home or small commercial room that can accept a 167-kilogram freight machine.
Evolve separates 110-kilogram stack size, 180-kilogram user limit, 5-kilogram minimum and four adjustment counts.
Advantage: current stock, shrouded stack, small top plates and a two-year product warranty.
Tradeoff: its 1530-by-1170-millimeter body needs a measured delivery and service route.
Skip it if: doorway, floor loading, assembly responsibility or local parts support remains uncertain.
Then consider: REP BA-5010 if a compatible bench is already owned.
The store showed three units and 1-3 working-day delivery; the exact final destination and installation still need seller confirmation.
Make a reject-or-continue fit card
For every intended user, create five empty fields: seat position, back support, thigh restraint, ankle roller and movement pivot. During an unloaded in-person trial, record only settings that allow ordinary entry, a stable seated position and comfortable contact without forcing a joint or pad. If one field has no workable setting, reject the machine or ask a qualified trainer for an equipment-fit assessment.
The card does not prescribe exercise range or decide whether the movement is suitable for an injury or condition.
Draw the plates and roller beyond the parked rectangle
Tape the published body dimensions on the floor. Add the radius of your largest plate beyond each horn, then mark the roller's visible travel, seat/back adjustment path, user entry side and maintenance access. For REP, attach the actual bench dimensions and cable route. Keep door swing and neighboring equipment outside the mapped sweep.
This is a clearance plan, not permission to operate closer than the maker's instructions allow.
Freight, assembly and fit are part of the machine
Ask who unloads, carries, assembles, anchors and removes packaging. Confirm floor suitability and whether warranty service requires original packaging or owner-paid freight. Keep adjustment pins, collars and fasteners on the maker's inspection schedule; stop using equipment with damaged cables, pads, welds or locking parts.
No machine here is recommended to diagnose, treat or rehabilitate pain or injury. Suitability, exercise selection and load progression belong outside this equipment-buying guide.
Resistance, construction, origin and support records
| Product | Size and weight | Materials | Manufacturing origin | Brand | Written support |
|---|---|---|---|---|---|
| REP BA-5010 attachment | 33.3 x 25.5 x 36.2 in attachment; item mass was not stated. Combined bench envelope varies. | Steel structure, foam rollers, vinyl upholstery and 2 in plate horns; exact gauges/blend not stated. | Not disclosed for exact model. | REP Fitness, Colorado; founded 2012; rack, bench and strength systems. | Structural welds lifetime; upholstery 30 days; pop-pins, pulleys, bearings and cables one year, subject to terms. |
| Titan SKU 401556 | 36 x 42 x 39 in; 108 lb; maker labels 300 lb weight capacity. | 11-gauge steel, HeftyGrip vinyl, 49 mm Olympic post and foam roller. | Not disclosed for exact model. | Titan Fitness, Memphis, Tennessee; value-focused strength equipment; exact launch year not verified. | One-year limited warranty for initial retail purchaser; exclusions and claim conditions apply. |
| Bolt Shock Series combo | 56 x 50 x 61 in; 230 lb stack; machine mass and user limit not stated. | Steel selectorized station with enclosed stack; exact gauge, cable and upholstery specifications not stated. | Not disclosed for exact model. | Bolt Fitness Supply, Houston, Texas; commercial and home equipment; establishment year not verified. | Obtain exact Shock home/commercial coverage in writing; product page does not state a model term. |
| Evolve Ultra Series UL-250 | 1530 x 1170 x 1602 mm; 167 kg machine; 180 kg maximum user. | 3 mm steel frame, PU-covered upholstery, nylon cable and shrouded 110 kg stack. | Not disclosed for exact model; seller UAB Megasportas is in Lithuania. | Evolve Fitness, Klaipeda District, Lithuania; commercial cardio and strength equipment; founding year not verified. | Two years on exact product; seller terms and regional statutory rights apply. |
Resolve these facts before freight leaves
- Match SKU, resistance system, included collars/pins and optional parts to the quote.
- Get separate written limits for user, plates or stack, and any band/cable combination.
- Trial every intended user unloaded through entry, settings and pad/pivot contact.
- Map working, plate, doorway, assembly and service clearances.
- Confirm delivery handoff, assembly/anchoring responsibility, parts and warranty class.
Machine, compatibility and support records
- REP BA-5010 product
- REP Europe attachment
- REP warranty
- Titan SKU 401556 product
- Titan machine fit and maintenance support
- Titan warranty
- Titan SKU/MPN record
- Bolt Shock combo
- Bolt company
- Bolt warranty
- Evolve UL-250 store
- Evolve UL-250 specifications
- Evolve terms
- Excluded Body-Solid GCEC340B
- Excluded Bells Basilisk
- Excluded Force USA Solitude
Found a changed capacity, model or stock state? Email Garage Gym Power with the exact URL, region and date.