Brisbane cyclists believe they're the victims of "mantraps", after damaging their bikes on handfuls of thumbtacks spread out along their favourite riding spots this past month.

There have been at least four instances throughout February where cyclists riding throughout Wynnum, Manly and Birkdale have punctured their tyre after riding over thumbtacks on the ground.

In the worst case, a group of cyclists came across thumbtacks glued to a strip of metal and left on the ground.

Tracey Yatras and her husband were on a Sunday cycle through the area this past weekend when both suffered punctured tyres from thumbtacks spread out "along a three-metre stretch".

Ms Yatras and her husband both suffered punctured tyres during their Sunday ride. (Supplied: Tracey Yatras)

"We were riding along, come out of a side street and came back onto the main road which is Birkdale Road and on the verge there, and I said to my husband, 'you have a flat tyre'," Ms Yatras said.

"We saw the tack in it, so he walked back to see where it happened and for about three metres the tacks were spread out down the side of the road."

The corner of Thomas Street and Birkdale Road where Ms Yatras and her husband ran over thumbtacks. (Supplied: Google Maps)

"There were a couple of pedestrians walking past and they helped us pick them all up."

Ms Yatras said the area where the tacks were left was along a popular route for cyclists.

"I just wish people didn't have this small-minded mentality, in an area where children are riding as well. Anybody could be hurt. I've seen elderly people on their tricycles ride down there as well."

"It's just sad."

'People go to extreme lengths to hurt us'

Earlier in the month, not too far from Birkdale, a group of cyclists came across a metal strip with tacks glued into them left on the Esplanade at Manly, another popular cycling route.

Laith Beveridge, owner of Cranks Bicycle Garage, said his wife and a friend were riding in a group when one cyclists caught the trap in his back wheel.

"It's lucky the way he caught it it didn't get caught up in his back wheel. It could've locked up and caused an accident," Mr Beveridge said.

Tacks glued to a trip of metal and left on the road along the Esplanade at Manly. (Supplied: Cranks Bicycle Garage)

He said it was disappointing to see so many recent incidents in the local area.

"People go to extreme lengths to try to hurt us," he said.

"I get that some cyclists can be a pain and quite noisy in the morning, I get that … but there's no excuse for putting out mantraps for people. No excuse.

"You can put a sign up in your front driveway for cyclists if you find them to be a pain, there are nicer ways of dealing with it."

Rival Bikes owner John Williams said he had a customer come into the store earlier this week with a thumbtack in his wheel.

"I had it happen to myself, last week sometime down on the Esplanade," Mr Williams said.

"I went another 50 metres and there was someone who had the same thing. It's unlikely it was a coincidence."

"Sometimes you pick it up and won't know for 100 metres until the tyre goes does."

'Someone could have been killed'

Bicycle Queensland CEO Anne Savage said someone could be killed riding over thumbtacks deliberately left on the ground.

Another cyclist had their tyre punctured by a tack along the Esplanade in Manly in late February. (Supplied: Rival Bikes)

"It is a serious criminal offence to set traps such as this with intent to harm cyclists and others," Ms Savage said.

"Somebody so easily could have been killed. We hope to see the full force of the law applied in finding and charging the people who committed this act.

"Deliberately endangering another person's life is not okay.

"We all have a role to play in making our community safe for others — we condemn this act in the strongest terms and urge anyone with information to go to the police."

Queensland Police Service said anyone who has a complaint should contact Policelink on 131 444.