Twin Strollers >>
HKM-4273491 Modular Twin Stroller with Twin Seats a Bassinet an Infant Car Seat Mode One-Step Fold and a Large Storage Basket
HKM-4273491
One Chassis, Four Riding Modes
The HKM-4273491 starts as a single in-line chassis with two module mounts set at staggered heights, one pod up front and one behind. Clip in the twin seats for two upright riders, the bassinet pods for two lying flat, or one of each for a mixed crew - and the front mount also takes an infant car seat for the shortest passengers. One fold motion draws the whole chassis down when the day is done, a large basket rides below, and a linked pedal holds both rear wheels wherever you park.
Key Features
Six details that make the HKM-4273491 chassis earn its keep.
One Chassis, Four Modes
The same frame carries twin upright seats, twin lie-flat bassinet pods, a mixed pairing, or an infant car seat up front - so one purchase covers the configurations a growing crew asks for instead of a shed full of frames.
Staggered Pods, Equal View
The rear pod rides higher than the front one, so neither child stares at the back of the other. Both riders get a clear look at the street, and reaching either module never means leaning over a sibling.
A Bassinet for Lie-Flat Rides
The bassinet pods give a rider a flat surface to stretch out on when sitting up loses its appeal. Mount one or both, and the module clicks onto the same posts the seats use - no extra frame, no second purchase.
Ready for an Infant Car Seat
The front mount accepts an infant car seat, so a sleeping passenger transfers from the car without a wake-up. The chassis takes the weight while the harness stays buckled and the ride keeps moving.
One Pedal, Both Rear Wheels
A linked foot brake locks the rear wheels in a single step, which matters more on a loaded chassis than anywhere else. Parking on a cambered path is one firm press, and releasing takes the same press back.
Storage Front to Back
A large basket hangs below the chassis for the day's load, and a rear pouch rides behind the backrest for the things a hand wants without stopping - so the gear rides with the crew, not on somebody's shoulder.
Overview
A single chassis that changes jobs in seconds.
The HKM-4273491 is a modular twin stroller built around one in-line chassis: two module mounts sit front and rear at staggered heights, and the modules swap to match the day. Twin seats carry two upright riders with a padded harness each; bassinet pods take over for lie-flat rides; a mixed pairing serves a napper and a watcher at once; and the front mount accepts an infant car seat. The push handle adjusts for whoever is steering, four wheels with a linked rear brake keep the roll predictable, and the whole chassis folds in one motion toward the rear wheels when the outing ends. A large basket below and a pouch behind the backrest swallow the gear two kids generate.
The Chassis, Drawn from the Side
Two mounts, staggered heights, one frame.

Seen from the side, the HKM-4273491 lays its idea out plainly: the front pod sits lower, the rear pod steps up behind it, and neither module hides the other. The stagger keeps both sightlines open and each mount clear for a fast swap.
Confirmed Specifications
Every confirmed detail of the HKM-4273491, listed at a glance.
Swapping Modes Without the Fuss
How the HKM-4273491 changes jobs between walks.
Mode changes on the HKM-4273491 follow the same rhythm every time: step the linked brake on, release the module latches, lift the current pods off their mounts, and click the next set home until each latch answers. The mounts take the seats, the bassinet pods, and the infant car seat without tools, so a configuration that starts as two upright seats can finish the afternoon as a bassinet ride for a sleeping crew. Because the chassis itself never changes - same wheels, same brake, same basket - a swap costs minutes rather than a garage session.
What’s in the Box
What arrives with the HKM-4273491.
1 x Modular Twin Chassis
In-line frame with wheels and brake fitted
2 x Twin Seat Modules
Seat modules with padding, harnesses, canopies
2 x Bassinet Pods
Lie-flat pods for the front and rear mounts
1 x Under-Chassis Storage Basket
Large basket hung below the frame
1 x Tool Kit
For the remaining assembly steps
1 x Manual
Setup, modes, fold, and care for the HKM-4273491
Why Choose the HKM-4273491
Six further reasons families pick up the HKM-4273491.
Four Modes, One Purchase
Seats, bassinets, a mixed pairing, and a car seat mount all run on the same chassis, so the stroller budget covers one frame instead of a different one for every stage.
A Bassinet Without a Second Frame
Lie-flat rides come from the same purchase: the bassinet pods click onto the chassis posts the seats use, which turns two upright riders into two flat ones in the time a latch takes.
Neither Pod Blocks the Other
The staggered mounts put the rear rider above and behind the front one, so a nap in the back never means a boot in somebody's seat and both riders watch the street.
Fold Once, Store Once
One chassis means one fold motion at the end of the day - the whole rig draws down toward the rear wheels in a single move and stands by the wall until tomorrow.
A Basket That Swallows the Day
The large under-chassis basket takes the bags, the spare layers, and the snacks for two, while the rear pouch holds what a hand needs without a full stop.
One Chassis to Maintain
Wheels, brake, latches, and fabric all belong to the same frame, so care is one routine - clear the axles, test the pedal, wipe the mounts - not a checklist per configuration.
Questions Parents Ask
What ages does the HKM-4273491 suit?
f The upright seat mode suits riders who sit with harness support, which lands most families from about 6 months through the early years - check your child's weight and head control against the manual before the first ride. The bassinet pods cover the lie-flat stretches before and between those upright months, and the car seat mode bridges the car-to-chassis transfer. Read the manual's limits for each module rather than guessing from the look of the seat.
How do the modes change over?
f Step the brake on first, then release the module latches and lift the current pods clear of their mounts. The seats, the bassinet pods, and the infant car seat all click onto the same posts - press until each latch answers with a click, then tug the module to confirm it is seated. A first swap indoors takes a few minutes; after that the sequence runs in under a minute. Empty the pods before lifting them, since a loaded bassinet changes the balance.
How does the fold work day to day?
f Take the riders out, empty the basket, and pull the fold trigger until the chassis draws down toward the rear wheels in one motion. Most trunks take the collapsed chassis with the pods off and stowed beside it. The first fold of the day is the stiffest; work the trigger twice and the mechanism loosens from the second cycle on. Store the chassis indoors so the latches stay dry and click the way they should.
Can the fabrics come off for cleaning?
f The canopies unzip from their mounts for spot cleaning - wipe them with a damp cloth and a little mild soap, then let them air-dry fully before reattaching. Skip harsh detergents, which dull the coating over a season. The seat and bassinet fabrics follow the care card's spot-clean routine. A monthly unzip-and-wipe keeps every module looking new, and the mounts wipe down in the same pass while the fabric is off.
How much fits in the storage basket?
f The large basket below the chassis is sized for the two-kid daily kit: bags, spare layers, and the snack supply. The rear pouch takes the reach-for items - wipes, keys, a phone. The rated load is listed in the manual, and overloading sags the frame and dulls the steering. Keep the heavy bags in the car and let the basket carry what a walk actually needs.
Is the handle right for two different parents?
f Yes. The push handle adjusts through a range, so a shorter and a taller caregiver can each set a height that keeps their wrists straight. Adjust it once, lock it, and it holds through the ride - re-check the lock if you swap pushers mid-walk. Two test steps with the brake on confirm the setting before the riders load in, and the padded grip keeps long walks easy on both hands.
Small Troubles, Fast Fixes
A wheel starts to drag or squeak.
f Flip the chassis and check the axle for hair, lint, or a pebble caught in the race - clear it out and spin the wheel by hand until it runs free. A drop of light oil on the axle ends most squeaks. Check all four wheels the same way, since the chassis picks up grit on every route, and a dragging wheel makes the linked brake work harder than it should. Do the four-wheel check after any walk on gravel, where a single stone can lodge deep enough to keep a wheel turning unevenly.
The fold latch feels stiff on a cold morning.
f Work the trigger a few times with the chassis upright before pulling it fully - the first cycle warms the mechanism. If it still resists, confirm the pods are empty, the basket is clear, and the brake is released. Indoor storage keeps cold mornings from stiffening the latch in the first place, and wiping the latch area dry after wet walks keeps the click crisp. A dry wipe on the trigger pivot keeps it moving in damp weather without gumming the works.
The chassis pulls to one side on flat ground.
f Check the front wheels for a wrap of hair around the axle first - that is the usual culprit. Then confirm the linked brake is fully released; a half-released pedal drags one side. If both check out, look at the load: a basket packed heavy on one side steers that side down, and rebalancing it toward the center evens the roll out. Rotate the front wheels by hand after the check - one that stops short of a free spin usually still holds grit.
A harness strap twists inside the buckle.
f Pull the strap straight through the shoulder slot and re-feed it flat before buckling. Twisted straps stop the buckle from seating fully - never ride with a half-clicked harness. A flat strap also spreads the load across the shoulder, which keeps the ride comfortable, so make the re-feed part of the every-walk buckle routine rather than a fix you reach for later. Check both modules when one strap twists, since the same folding habit usually marks the pair.
A module clicks feel loose on its mount.
f Lift the module off and re-seat it - press down until the latch gives a firm click, then tug the module sideways and up to confirm it is locked. Grit on the mount posts is the usual cause, so wipe both posts when you swap. If a latch still feels soft after a clean re-seat, stop using that module and check the manual's service notes before the next ride. A soft click instead of a firm one usually means the posts need a wipe, not a replacement part.
A canopy sags forward on a windy day.
f Slide the canopy mount back one notch and re-seat it - the pivot holds firmer at the shorter reach. On gusty walks, run the canopies at mid-extension instead of full, and angle them into the wind so the panels shed the gust instead of catching it. Check the mounts for a click after the walk, since the same gusts that sag the fabric can work a mount loose over time. Check the rear canopy as well as the front one - the rear panel takes the wind first on this layout.
Service & Policies
Coverage that keeps working long after the stroller box arrives.
Free Shipping on All Orders
Every order ships free. Handling time: 0-1 business days (Monday to Friday). Transit time: 2-5 business days (Monday to Friday). A tracking number is emailed as soon as the parcel leaves our warehouse.
180 Days Purchase Protection
Your purchase is protected for 180 days from the delivery date against manufacturing defects and damage in transit. If something arrives wrong, we make it right.
30 Days Money Back Guarantee
Not completely satisfied? Request a return within 30 days of delivery for a full refund. We keep the process simple and hassle-free.
24 Months Warranty Service
The product is covered by a 24-month warranty from the delivery date against manufacturing defects. Coverage includes parts and labor; normal-wear items are excluded.
Important Safety Notes
Read these notes before the first ride in the HKM-4273491.
The HKM-4273491 is a manual modular stroller with no powered parts, one rider per module. Step the linked brake on before swapping modules and whenever the chassis stands still, slopes included. Press every module onto its mounts until the latch clicks, then tug to confirm the seat is locked before a rider loads in. Buckle the harness at each seated module before the wheels turn, never leave a child unattended, and keep the basket load low and even so the chassis stays planted. Do not hang bags on the handle, because extra weight there can tip the chassis backwards. When using the car seat mode, confirm the seat is locked to its mount by lifting before walking. Keep hands clear of the mount posts and latches.
HKM-4273491 - modular in-line twin stroller with a single chassis carrying twin seats, lie-flat bassinet pods, a mixed pairing, or an infant car seat on staggered front and rear mounts, a full canopy and padded buckle harness per seated module, an adjustable push handle, four wheels with a linked rear foot brake, and a large storage basket below. Read the manual before first use. Nothing here is safety certification advice.
Every product we offer includes a 180-day purchase protection plan at no additional cost. This coverage extends beyond a standard warranty, reflecting our confidence in product quality and our ongoing commitment to your satisfaction.
The protection plan is designed to provide practical help in real-world situations. Whether you encounter a manufacturing issue, a performance problem, or an unexpected accident, our team is ready to assist with clear, fair solutions.
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Free repair or replacement if the product fails under normal use.
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The 180-day purchase protection includes accidental damage and performance failures that are typically not covered by a standard warranty. It provides an additional layer of support during the first six months after purchase, giving you greater confidence and peace of mind.
We want you to be completely satisfied with your purchase. If for any reason you are not fully happy, you may return your item within 30 days of delivery for a full refund. No lengthy forms, no unnecessary questions.
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30-Day Window
Request a return within 30 days of delivery.
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Refund processed within 10 business days.
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Please inspect your order as soon as it arrives. If the item is defective, damaged, or incorrect, contact us immediately so we can evaluate the issue and make it right. For exchanges, the fastest option is to return the original item and place a new order for the replacement.
We believe in the quality of our products, and we want you to share that confidence. Every product is backed by a 24-month warranty covering all structural and functional components, including zippers, buckles, straps, and fabric integrity.
The warranty is designed to be simple and accessible. You only need your proof of purchase to begin a claim, and our team will assess the issue promptly. If a manufacturing issue arises, we will make it right.
What the Warranty Covers
Comprehensive Coverage
Every part warranted for two full years.
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Whichever is faster, at no cost to you.
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Claims assessed within 1 business day.
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Contact Information
24/7 Phone
+1 (209) 280-3200
support@hekomart.com
Address
3401 Dale Rd, Modesto, CA 95356
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Available 24 hours a day, 7 days a week