A rising profit curve, solid margins and improvements in free cash flows are all signs of a good stock pick.

Here's one such company that may have zipped past your radar, unnoticed: The Goodyear Tire & Rubber Company (GT - Get Report) , which trades at cheap valuations and promises the possibility of great gains once everybody realizes what they've been missing.

GT Chart GT data by YCharts

Let's quickly get you the details and explain why this stock belongs in your long-term wealth-building portfolio.

The stock has surefire momentum on its side, but it isn't something that's really caught on yet with the investment herd.

For the third straight year in 2015, Goodyear is slated to trump its peer rubber and plastics stocks on a total returns basis -- and by a big margin. Even after its run-up, the stock trades at 8.8 times price to forward earnings compared to peers like Bridgestone Corp. (12.4 times), Michelin (9.7 times) and Pirelli (13.4 times). The stock's value is not limited to price to earnings only. On a price to cash flow basis, Goodyear trades at less than 5 times even as nearest rivals are at 6-to-8 times multiples.

Goodyear employs approximately 66,000 people and manufactures its products in 49 facilities across 22 countries around the world. Its consumer brands include Fulda (Europe), Dunlop, Sava (value for money offering), Kelly (budget product) and Debica.

Building Earnings and Driving Innovation

Tire makers aren't as alluring to investors as Silicon Valley super stars like Apple, but Goodyear has beaten analysts' expectations for the last six quarters in a row, beating earnings-per-share (EPS) estimates. That's the sort of performance that investors with an eye on the long-term horizon truly covet.

Coming to full-year predictions, investment experts project that Goodyear will finish the 2015 fiscal year with an EPS of $3.12, translating to a growth of 10.2% over the EPS of $2.83 (for the 2014 fiscal year). For 2016, EPS is likely to witness a nearly 20% rise over the fiscal 2015 number, and come in at $3.74. This stock is among the positive growth stories that await discerning investors in 2016.

What cements our support for Goodyear is the company's strong financial performance in a volatile global economy as well as the challenging tire industry. It clearly shines a beacon on Chairman and CEO Rick Kramer's key strategic interventions and execution capabilities.

This year North America (particularly the region's demand for HVA tires) has worked wonders for the tire maker. For the third quarter, each of its global businesses achieved segment operating margins of 11% or more.

The company also remains one of the first in the industry to tap emerging e-commerce opportunities. In fact, competitors have tried to replicate the Goodyear approach, a true testament of its ability to stay abreast of current market trends.

Of course, Goodyear must address its EMEA business predicaments, which include the effects of a strong U.S. dollar and soft winter tire sales, especially for the third quarter.

Kramer has appeared very confident in achieving the targeted earnings growth for 2015 and 2016. The company expects full year segment operating incomes to nearly hit $2 billion, translating to an over 100% growth of the figure from just five years ago.

Granted its debt is on the higher side, but the company appears to be comfortably placed given its continued free cash flow (FCF) situation -- it generated over $1.2 billion in the last 12 months.

We believe the company could see favorable tailwinds in the form of cheaper raw material costs even as the U.S. Federal Reserve maintains its accommodative stance and keeps the weakened commodity price scenario intact. This will only lower costs and help generate more earnings if Goodyear can reinforce its vice-like grip on the "replacement" side of the business.

And so, undiscovered as it might be, Goodyear is a dependable and steady stock for you growth portfolio.

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This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.