Roadmaster InvisiBrake 8700
#5 in BrakeFull review
For owners who keep one towed car and want a brake they never handle. Proportional systems brake more smoothly.
Amazon $1,380$1,380
The Roadmaster InvisiBrake 8700 is the better tow bar overall, rated 3.8 to 3.8. The Roadmaster InvisiBrake 8700 leads on weight or install and price. The Roadmaster InvisiBrake 8700 costs $215.95 less ($1,380 vs $1,595.95).
CURT RVibrake 4 52202
#6 in BrakeFull review
For owners who want a portable brake with a wireless monitor. Check that its braking style suits you before paying this much.
Amazon $1,595.95$1,595.95
Prices were last checked November 3, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Roadmaster InvisiBrake 8700 for weight or install (stays installed in the car vs portable, set up each trip) and price ($1,380 vs $1,595.95).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every brake tow bar; a clear win is highlighted. How we rank explains each one.
| Factor weight | Roadmaster InvisiBrake 8700 | CURT RVibrake 4 52202 |
|---|---|---|
| Overall rating | 3.8/5 | 3.8/5 |
| Price 25% | 46 $1,380 | 28 $1,595.95 |
| Capacity or braking 20% | 0 set braking force, not proportional | 50 braking type not published (neutral score used) |
| Weight or install 15% | 100 stays installed in the car | 50 portable, set up each trip |
| Features 20% | 100 breakaway included, motorhome monitor included | 100 breakaway included, motorhome monitor included |
| Warranty 20% | 100 limited lifetime warranty | 100 limited lifetime warranty |
Specifications
| Roadmaster InvisiBrake 8700 | CURT RVibrake 4 52202 | |
|---|---|---|
| Tow bar | ||
| Type | Supplemental brake | Supplemental brake |
| Braking | ||
| Proportional | No | - |
| Install | Installed | Portable |
| Breakaway included | Yes | Yes |
| Motorhome monitor | Yes | Yes |
| Build | ||
| Warranty | Limited lifetime | Limited lifetime |