Helping San Francisco’s entire offense shine, too. These big boys block all over the field, every which way — even if it means taking on a speedy, more athletic defensive back.

“It’s fun because they look at you like you’re not supposed to be down there,” right tackle Anthony Davis said Wednesday. “We’re a lot bigger than them.”

Gore appreciates every athletic block, every hustle play.

The three-time Pro Bowl running back insists he has never had such huge holes ahead of him to run, and that is the ultimate compliment to the 49ers’ talented, much-improved O-line. Gore is now gearing up for a strong stretch the rest of the way with the NFC West-leading Niners (6-2), as long as these guys keep doing the dirty work ahead of him to keep things clicking toward another playoff berth.

Gore has run for 656 yards on 119 carries, averaging a career-best 5.5 yards — topping his 5.4 average in 2006.

“My O-linemen are doing a (heckuva) job of springing me and giving me big lanes that I’ve never seen before,” Gore said. “So I have to give it to them, and to the receivers blocking down field.”

While Gore has only played alongside two Pro Bowl linemen during his eight NFL seasons with San Francisco — Larry Allen in 2006 and left tackle Joe Staley last season — recognition hardly means much to this tight-knit unit that truly enjoys going to work together each day during the grind of a 16-game season.

Early last year, the line faced criticism for a slow start, then took more heat after quarterback Alex Smith was sacked nine times in a Thanksgiving night loss at Baltimore. Staley, Jonathan Goodwin and Co. have done their best to ignore — and sometimes even call out — the skeptics and move forward by sticking together to stay the course.

“There’s a lot of talent in that room, on that line. The one thing I’ll say about this line is it’s a hard-working line, it’s a line that’s not satisfied with a little success,” Goodwin said. “I think everybody wants big success for themself and this team.”

And the Niners are getting more of a push from opposing defenses within the division this season, as every team has either upgraded or just plain improved on that side of the ball.

Rams coach Jeff Fisher realizes what a load his defense faces on Sunday in stopping Gore, slowing down Smith and his large cast of receivers — and doing all that against a physical, do-everything offensive line.

“I can’t remember having to prepare for an offense that was so well-coached and so diversified in the run game and so talented, the different types of run concepts,” Fisher said.

Smith connected with nine different wideouts in a 24-3 road rout of the Arizona Cardinals on Monday Night Football on Oct. 29, and like Gore the quarterback gives much of the credit to the line. Smith was also sacked four times that night and has been taken down 22 times this season for 128 lost yards — yet the 2005 No. 1 overall pick recently said he takes the blame and would rather be sacked than risk throwing an interception.

“They have a lot on their plate, week in and week out,” Smith said. “We ask them to do a lot, run and pass. Really, our balance starts with them, the ability in the run game and then protect in the pass game. They continue to execute, not just physically but mentally.”

That’s just part of the job, said left guard Mike Iupati. He and Davis were both first-round draft picks in 2010 and became instant starters. Now, they’re veterans.

“We’re all on the same page. We want to win. That’s the key to it,” Iupati said. “Just sticking together, camaraderie. We have each other’s back, and also the communication factor.”

Whatever makes them work, other teams are taking notice. There’s so much to deal with on San Francisco’s offense.

“They have a lot invested in the O-line and do a very good job. It just makes that play action a nightmare when you try to stop the run,” St. Louis linebacker James Laurinaitis said. “And when you have an O-line like that, they have some weird running plays. They’ll run some running plays I don’t think I’ve seen since the Tecmo Super Bowl, playing that video game.”