Quick verdict
For Echo SRM and PAS trimmer owners, the genuine Echo Speed Feed 400 head is the pick. It reloads without disassembly by threading line and turning the knob, and as the OEM part it removes all fit guesswork.
Echo 99944200907b New Genuine Speed Feed 400 Head fits All S
This is the genuine Echo 99944200907B Speed Feed 400 head, the OEM bump feed head that fits Echo SRM trimmers and delivers the fast Speed Feed reload Echo built its reputation on, threading line through and turning the head rather than disassembling it. As the factory part, it takes all compatibility guesswork off the table.
Check price on Amazon →Best trimmer bump feed head picks for Echo SRM and PAS trimmers, from the genuine Speed Feed 400 head to quick-reload universal replacements and OEM caps.
Why you should trust this guide
Bump feed heads are defined by how they reload and what they fit, so I read each listing for the reload mechanism, the bolt thread, and the exact Echo and Shindaiwa models covered. The Speed Feed 400 family dominates this category, and I am careful to separate the genuine Echo head from aftermarket copies and from parts like a spool cap that are not full heads at all. That distinction matters because ordering a cap when you needed a head, or the reverse, means a wasted purchase and more downtime.
I match you to the head that fits your trimmer and your reload preference, whether that is the fit-guaranteed OEM head or a value multi-pack that keeps spares in the shop for when one finally cracks. Where a listing is really a replacement part like a spool cap rather than a complete head, I say so plainly rather than letting an ambiguous title do the misleading. Being clear about exactly what is in the box is the whole point of a buying guide for parts like these, because a wrong part order is time lost and a job stalled.
How we evaluated
My leading criterion is compatibility: the bolt thread and direction, the shaft type, and the published list of Echo SRM and PAS and Shindaiwa models each head fits. Bump feed heads that document their dimensions, bolt spec, and included adapters earn extra weight for reducing mismatch risk, because a well-documented listing lets you verify fit before ordering instead of hoping it works out and dealing with a return when it does not. The more precise the fit information, the more confidence you can have clicking buy.
Next I look at the reload action, since the Speed Feed mechanism, threading line through and twisting without disassembly, is a genuine convenience over older bump heads that require taking the head apart and fighting a spool by the side of the yard. I also weigh build material, favoring impact-resistant plastic that survives hitting curbs and rocks, the range of line diameters a head supports so you can run heavier line, and pack count for spares. I assess these on documented specs and design, not bench testing, and I flag any maker claim about durability or line capacity as unverified so you can judge it on its merits rather than assume it has been proven. Pack count also matters for anyone who runs a trimmer hard, since heads eventually crack against curbs and rocks, and having a spare on the shelf means a failed head does not end your afternoon or leave you waiting on a new order in the middle of a busy stretch of yard work.
What to look for
- Bolt thread and direction, such as M10 x 1.25 LH, matching your trimmer exactly before you order
- The published Echo SRM, PAS, and Shindaiwa model compatibility list, checked against your exact machine
- The Speed Feed reload action, which threads line through without disassembly for fast refills in the field
- Supported line diameters, since some heads take everything from .080 through .120 for heavier weeds
- Build material, favoring impact-resistant plastic that resists cracking against curbs, rocks, and hardscape
- Whether you are buying a full head, a multi-pack of heads for spares, or just a replacement spool cap
- Included adapters for wider fit across different shaft and bolt sizes so one head serves more trimmers
How we test
We base every pick on real-world use, published manufacturer specifications and verified owner feedback. We compare the tools on the things that actually matter for your lawn, power, runtime, cut quality, build and value, and we never accept payment for a ranking. When we have not used a specific model first-hand, we say so.
The picks at a glance
| Tool | Best for | Score | |
|---|---|---|---|
| Echo 99944200907b New Genuine Speed Feed 400 Head fits All S | Best Overall | Check price | |
| VIABRICO Trimmer Head Compatible | Best Value | Check price | |
| 3 Pack String Trimmer Head compatible | Best Premium | Check price | |
| Hipa Speed Feed 400 Trimmer Head | Best Budget | Check price | |
| Echo Genuine OEM Speed Feed 400 Trimmer Head Replacement Spo | Also Great | Check price |
The picks, reviewed
Echo 99944200907b New Genuine Speed Feed 400 Head fits All S
This is the genuine Echo 99944200907B Speed Feed 400 head, the OEM bump feed head that fits Echo SRM trimmers and delivers the fast Speed Feed reload Echo built its reputation on, threading line through and turning the head rather than disassembling it. As the factory part, it takes all compatibility guesswork off the table.
Reasons to buy
- Brand New Echo 99944200907B Speed Feed 400 Trimmer Head...
Reasons to avoid
- As a genuine single head it costs more than aftermarket multi-packs
- The listing offers little detail beyond the part number and fit
VIABRICO Trimmer Head Compatible
The VIABRICO 5-pack is a Speed Feed 400 style bump head made from a stronger material to resist cracks, with a 3-3/4 inch diameter and M10 x 1.25 bolt, fitting a wide list of Echo SRM and PAS models plus Shindaiwa units. It reloads without disassembly, and five heads mean you always have spares on hand.
Reasons to buy
- Universal Weed Eater Head
- Upgraded Line Storage Capacity
- Our weed eater bump head is compatible with Echo Speed Feed 400 SRM-225 SRM-210 SRM-2100 S
- Our weed eater trimmer head replacement is compatible with Echo PAS-210 PAS-211 PAS-225 PA
- Fits Shiandaiwa T195S T220 T222 T230 T230s T231 T242 T242X T2510 T2510X 22T C230 C242 C251
Reasons to avoid
- Match the M10 x 1.25 bolt and 10mm hole to your trimmer first
- Aftermarket plastic may not match the genuine Echo feel
3 Pack String Trimmer Head compatible
This 3-pack is the same universal Speed Feed 400 style bump head in a smaller count, using tougher material and a large line-storage capacity while covering the same broad Echo SRM and PAS and Shindaiwa compatibility. It reloads by threading line through the holes and turning the cap, a middle-ground quantity for owners who want a spare or two.
Reasons to buy
- Universal Weed Eater Head
- Upgraded Line Storage Capacity
- Our weed eater bump head is compatible with Echo Speed Feed 400 SRM-225 SRM-210 SRM-2100 S
- Our weed eater trimmer head replacement is compatible with Echo PAS-210 PAS-211 PAS-225 PA
- Fits Shiandaiwa T195S T220 T222 T230 T230s T231 T242 T242X T2510 T2510X 22T C230 C242 C251
Reasons to avoid
- Cross-referencing the long fit list is on you before ordering
- Aftermarket durability varies compared to the OEM head
Hipa Speed Feed 400 Trimmer Head
The Hipa Speed Feed 400 head stands out for documented specs: an M10 x 1.25 LH bolt, pre-loaded with 13 feet of .105 line, 4-1/4 inch width, support for .080 through .120 line, and included adapters for wider fit. It reloads in under 30 seconds by inserting line and turning the knob, no tangling on the rewind.
Reasons to buy
- Echo SRM 225 Trimmer Head Replacement for Speed feed 400; Compatible for Echo SRM225 SRM20
- Speed Feed 400 Trimmer Head Compatible for Echo PAS225 PAS210 PAS211 PAS225VP PAS225VPB PA
- Note: IF You model is GT225, You need the 8mm x 3/8-24 RH Black Bolt. This item need the a
- [HEAD DIMENSIONS]: Bolt Size: M10 x 1.25LH; Pre-loaded with 13-ft of .105-in line; Overall
- [UNIVERSAL FIT]: The kit includes various attachments, allowing the trimmer head to achiev
Reasons to avoid
- The GT225 needs a separate bolt and it excludes certain PAS units
- Universal adapters add steps versus a single-fit OEM head
Echo Genuine OEM Speed Feed 400 Trimmer Head Replacement Spo
This is a genuine Echo OEM Speed Feed 400 replacement spool cap, sold as a 5-pack under part X472000070 for SRM-225, SRM-230, and PAS-225 heads. It is not a full head but the exact cap that wears or cracks over time, so it revives bump feed heads you already own at low cost.
Reasons to buy
- Includes (1) X472000070 Spool Cap.
- New, Bulk Packed.
- Genuine OEM ECHO Replacement Part.
- Consult owners manual for proper part number identification and proper installation.
- Please refer to list for compatibility.
Reasons to avoid
- It is only the spool cap, not a complete bump feed head
- You must confirm the X472000070 cap matches your head
What to look for
Fit your trimmer first
Every head here targets Echo SRM and PAS straight-shaft trimmers with an M10 x 1.25 bolt, but exclusions exist and some models like the GT225 need a specific bolt. Match your model number and bolt thread to the listing before buying to avoid a head that will not thread on.
Speed Feed reload convenience
The Speed Feed 400 action lets you push line through the head and twist a knob to reload, no disassembly and no fighting a spool. It is the main reason this family is popular. All the full heads here use that mechanism for fast reloads.
Genuine versus aftermarket
The genuine Echo head guarantees factory fit and quality, while aftermarket multi-packs from VIABRICO give you three or five heads for spares at a lower cost each. If you run a trimmer hard, backups make sense; if you want zero fit risk, buy OEM.
Supported line diameter
Check the line range a head accepts. The Hipa head, for instance, handles .080 through .120 line, giving you flexibility to run heavier line for tough weeds. Confirm the head feeds the gauge you prefer to use.
Head versus replacement part
Not everything in these results is a full head. The Echo OEM spool cap 5-pack is just the cap that wears out. If your head is fine but the cap cracked, buying the cap alone is the cheaper fix, so read the listing to know what you are getting.
Our verdict
For Echo SRM and PAS trimmer owners, the genuine Echo Speed Feed 400 head is the pick. It reloads without disassembly by threading line and turning the knob, and as the OEM part it removes all fit guesswork.
FAQs
A bump feed head advances line when you tap the head on the ground while trimming, feeding out fresh line as the old line wears down. The Speed Feed 400 family here also adds fast reloading, letting you thread new line through the head without taking it apart.
These heads fit a wide list of Echo SRM and PAS straight-shaft trimmers, but not every model, and some like the GT225 need a specific bolt. Match your exact model number and bolt thread to the listing's compatibility list before ordering.
The genuine Echo Speed Feed 400 removes all fit guesswork and matches factory quality. Aftermarket multi-packs like the VIABRICO 5-pack cost less per head and give you spares. Both reload the same way; choose based on whether you value zero fit risk or backups.
It varies by head. The Hipa Speed Feed 400 comes pre-loaded with 13 feet of .105 line and accepts .080 through .120. Larger line-storage heads let you reload more line at once, meaning fewer stops to refill during a job.
If your head cracks or the reload mechanism fails, replace the head. If only the spool cap is worn or broken, a genuine cap like the Echo X472000070 5-pack fixes it for far less. Inspect your head to see which part actually failed before buying.